The Western Electric Model 500: A Patent for the Handset, and a Trademark the Company No Longer Owns

By Matthew Partsch · Owl and Twig Vintage · October 2, 2026

U.S. Design Patent D151,614 covers a Western Electric Model 500 telephone's handset. It does not cover the base, the dial, the ringer, or the molded shell most people picture when they hear "the classic Bell phone." The WESTERN ELECTRIC name on that base has its own separate story: the original registration lapsed, a second one survived a challenge decades later, and today it belongs to a small Georgia audio company that has never built a telephone. Here is what each record actually proves, and what it does not.

The design patent covers the handset, not the whole phone

U.S. Design Patent D151,614 is titled, plainly, "Design for a Hand Telephone." Henry Dreyfuss filed it June 24, 1947. It granted November 2, 1948. The assignee of record is Bell Telephone Laboratories, Incorporated — not Western Electric, the company whose name is molded into the base and whose factories actually built and sold millions of these phones. The patent's drawings show side, top, bottom, and end views of a handset: the piece a caller lifts and holds. They do not show the dial, the base housing, the ringer, or the cradle. A seller who says "the Model 500's patent" usually means this one, and usually means it as if it covers the whole object. It covers roughly a third of it.

The handset shown in D151,614 came out of an unusually empirical design process. Bell engineer Robert Hose produced the first sketches in 1946. Dreyfuss's team then measured, by their own account, more than two thousand human faces to work out the ideal spacing between mouth and ear, which led to a flatter, squared-off shape the design team nicknamed the "lumpy rectangle" — the Model G handset. Separately, industrial psychologist John E. Karlin reworked the rotary dial so the letters and numbers sat outside the finger holes instead of inside them, and added small raised "aiming dots" inside each hole, a change Bell's own research credited with shaving roughly seven-tenths of a second off the average dial time. None of that dial work is part of D151,614; the patent covers the handset's shape, full stop.

The complete phone reached the public in stages, not on one date. Field trials ran 4,000 sets in 1949. Western Electric announced the design publicly the same year. General commercial availability did not begin until the second quarter of 1950, and the Model 500 then stayed Bell's standard-issue desk phone until the 1984 breakup of the Bell System, replacing the earlier Model 302 that had been in service since 1936.

A second Dreyfuss patent, twenty years later, covers a different phone

Henry Dreyfuss's name appears on a second telephone design patent, U.S. Design Patent D219,029, titled "Telephone Set." It was filed February 2, 1968 and granted October 27, 1970 — twenty years after the Model 500 reached the market, and this time the title describes a complete set rather than a handset alone. The filing date and era line up with the Trimline telephone, the slimmer design Dreyfuss's firm developed with Bell engineer Donald Genaro between 1962 and 1965, which put the dial in the handset itself. This guide could not independently confirm that D219,029 is specifically the Trimline's patent beyond that circumstantial match of date, inventor, and title, and says so rather than treating the connection as settled.

Two decades separate those filings. In that gap, the same inventor went from patenting a piece of a phone to patenting the whole thing — a reminder that "Dreyfuss designed it" and "Dreyfuss's patent covers it" are not the same claim, and a seller citing either patent by Dreyfuss's name alone has not actually said which phone, or how much of it, that patent describes.

The Western Electric name outlived the company that filed it

WESTERN ELECTRIC became a federally registered trademark on November 21, 1922 (Registration No. 0161852, Serial No. 71,158,067), filed January 22, 1922 by the original Western Electric Company, with a sworn first use in commerce of January 1910. Its listed goods were narrow — electrical testing equipment, meters, gauges, telephone-message registers — and by the time it was cancelled under Section 18 on June 21, 2011, ownership had passed to Lucent Technologies Inc., a successor several corporate steps removed from the company that built the Model 500.

A second WESTERN ELECTRIC registration, filed August 25, 1965 by Western Electric Company, Incorporated while the original company still existed, covers a far broader set of goods — telephone apparatus, switchboards, telegraph equipment, radio transmission gear, data processing equipment, and more. This one, Registration No. 0834269, swears to the same 1910 first-use date but survived to the present: a cancellation proceeding filed against it in October 2016 was denied in January 2017, and USPTO records show it "Registered and Renewed" as of that date. Its current owner is Western Electric Export Corporation.

Western Electric itself stopped operating under that name in 1984, when the FCC-ordered breakup of the Bell System split AT&T from the regional phone companies. Its manufacturing and research arm became part of AT&T Technologies, then Bell Labs was spun off into Lucent Technologies in 1995 — the same year Western Electric Export Corporation was founded. Charles G. Whitener, previously of Westrex Corporation, started that new company under a trademark and intellectual-property license AT&T granted him, and it makes premium 300B vacuum tubes and tube-driven audio amplifiers in Rossville, Georgia. The company that answers to "Western Electric" today has no telephone in its product line.

Why some bases say "Bell System Property, Not for Sale"

Before 1968, a Bell System customer generally leased their phone rather than owning it, and the system did not allow non-Bell equipment on the line. The FCC's 1968 Carterfone decision changed that: it ruled that outside devices could be electrically connected to the network as long as they caused no harm to it, opening the door to customer-owned phones, modems, and answering machines for the first time. Western Electric began molding "BELL SYSTEM PROPERTY — NOT FOR SALE" into later Model 500 bases from around that point on, a way to mark which phones on a now more open network still belonged to the phone company rather than the customer. That phrasing, and the rough timing, come from a single source checked for this guide; no internal Bell System Practices document confirming the exact start date was located.

The 1984 divestiture changed the arithmetic again. Customers could finally buy outright the phones they had been leasing for decades, newly ownable rather than newly obsolete, which is a real part of why so many Model 500s ended up loose on the secondhand market in the years that followed.

How collectors date one by the stamp on the base

A Model 500 base typically carries a stamped code combining a model designator with a two-digit year — for example, "C/D 500" followed by "55" for a phone made in 1955. Collector references pair that year stamp with a set of material clues that track roughly with era: black Bakelite hook-switch buttons point toward an earlier phone, while clear plastic buttons indicate a later manufacture or a replaced part; a six-hole handset cap is original to an earlier set, while a seven-hole cap signals a later replacement; short, stubby handset-cord ends are original, while tapered ends mean the cord was swapped in the field at some point after the phone left the factory.

Color offers a second, cruder clue. The Model 500 shipped in black only from 1950 through 1953. Bell's "designer colors" — ivory, beige, pink, turquoise, red, and others — arrived starting in 1954, for a one-time installation surcharge. A colored example is a 1954-or-later phone by definition; a black one could be from any year of the run.

How to tell a real one

• Weight gives it away fastest. A genuine Model 500 runs close to five pounds, built around real metal hardware inside a molded shell. A lightweight example with the same silhouette is a modern reproduction, not a Bell-System-era set.
• The base reads "Bell System Made by Western Electric," and the handset reads "Western Electric Made in USA" along with a handset-generation code (the earlier F1 shape, later the squarer G1). A base or handset missing both markings did not come out of a Western Electric factory.
• A molded "Bell System Property — Not for Sale" legend, where present, points to a phone made from roughly 1968 onward rather than earlier — though plenty of genuine early sets no longer have legible molding text at all, so its absence alone proves nothing.
• A hardwired cord with no modular plug suggests, without proving, an earlier or never-retrofitted example. Registered modular jacks were invented at Bell Labs in 1973 and only codified into federal regulation in 1980, and plenty of older sets were retrofitted with a modular plug well after they were built — so a modular jack by itself says nothing reliable about age.
• The base's stamped model-and-year code, read alongside button material, handset-cap hole count, and cord-end shape, gives the fullest picture — no single clue above should be read alone.

The look-alikes: modern reproductions built to look old

Decorative rotary-style phones built new and sold today copy the Model 500's silhouette and color range closely enough to fool a quick glance. The reliable differences are the same ones that separate any genuine Bell-System set from a reproduction: a modern reproduction is noticeably lighter, since it is built from thin plastic around simple modern electronics rather than real mechanical switchgear; it carries no "Western Electric" or "Bell System" molded text anywhere on the base or handset, because no such company made it; and its modular jack, dial action, and ringer are all original factory features of a current product, not retrofits layered onto a decades-old mechanism. None of that makes a reproduction worthless as a working phone — it just means it is not what a Western Electric base stamp would make it out to be.

What a Model 500 actually sells for

No confirmed realized auction price for a Model 500 was found through any source this research could reach; WorthPoint's price-history pages sit behind a sign-in wall for this item, and no public auction-house lot archive turned up a result. Every figure here is an asking price, not a sale.

An untested black example, described by its seller as not tried on a live line and sold as-is with one damaged plug, was listed at $45.00 on eBay. A fully disassembled, cleaned, timed, and repainted example — new fingerwheel, new dial card, sandblasted and clear-coated base, new cords — was priced at $362.51 CAD by a dealer specializing in phone restoration. Independent collector write-ups describe a broader range, roughly $15 to $193, depending heavily on color and condition, with black the most common and least expensive and special colors like turquoise or pink commanding more. The spread is a restoration-and-rarity story more than an age story: a worn black 1952 example and a repainted, rewired black 1970 example can land on opposite ends of that range for reasons that have little to do with which one is actually older.

Where the records disagree

Three points in this research did not resolve cleanly, and are left open rather than forced to a single answer.

First, when the Model 500 actually became available to the public. Development began in 1946, field trials covered 4,000 lines in 1949, and Western Electric's own general commercial availability did not begin until the second quarter of 1950. Many dealer listings and casual references compress all three into "1949," which overstates how early an ordinary customer could have gotten one.

Second, exactly what U.S. Design Patent D219,029 covers. Its filing date, era, and the fact that it names Henry Dreyfuss as inventor all point toward the Trimline telephone, but the source checked for this guide did not state the connection directly, and no model name appears on the patent record itself. The link is treated here as likely, not confirmed.

Third, the exact start date for the "Bell System Property — Not for Sale" marking. One source places it at "circa 1968 onward," which lines up logically with the Carterfone decision that same year, but no primary Bell System document fixing that date was located for this guide, so the marking's start is reported as approximate rather than documented.

For more Electronics & Phones history from this shop, see the guide to the Western Electric Princess phone and the guide to the Zenith Space Command remote. For the rest of the library, see the Field Guides index.