Owl & Twig
The Field Guide
How to identify, date, and value the things you find. Written from what passes through our hands, one estate sale at a time.
FeaturedSeller's Desk
Find us in Waterford: our new booth at The Rabbit Hole
The Rabbit Hole in Waterford Township is doubling its floor space and adding 23 new vendors, and Owl & Twig is on the lineup. Booth pieces are sold in the store only. Reopens September...
Nothing in that drawer yet.
LightingHandel Lamps: Two Patents, and a Trademark the Company Never Filed
A 1904 patent describes the glass process that made Handel lamps famous. A 1910 patent for a shade-mounting...
LightingBradley & Hubbard: The Lamp Company That Never Trademarked Its Own Name
Two brothers-in-law patented 238 lamp designs and mechanisms in Meriden, Connecticut — then let the company's own name...
LightingAmerican Gas Machine Co.: the company that built Sears' lanterns
Every J.C. Higgins gasoline lantern pulled from a basement was built by a small Minnesota company Sears never...
LightingColeman Lanterns: The Patent Belongs to a Memphis Rival, Not Coleman
The gasoline lantern burner mechanism Coleman has sold for over a century was patented by a Memphis rival...
LightingThe Guy's Dropper: Frank Guy Filed His Carbide Lamp Patent Two Years Too Late
By Matthew Partsch · Owl and Twig Vintage · October 1, 2026 Frank Guy's dropper valve gave the...
LightingThe Dietz lantern: the cold-blast patent wasn't Dietz's, and the rival who copied it became Adlake
The cold-blast mechanism that still names Dietz's lanterns was patented by a Philadelphia machinist, not by Dietz --...
LightingTension pole lamps: the Supreme Court case that let anyone make one
Stiffel patented the tension pole lamp in 1956. In 1964 the Supreme Court ruled its patents did not...
LightingThe Phil-Mar panther catalog: two models, two glazes, and a company that never said TV lamp
Phil-Mar's own 1959 and 1961 trade catalogs name the panthers, number them, measure them, and list the only...
LightingLane & Co.: the TV lamp maker that made thousands of them and left barely a trace of itself
Lane & Co. of Van Nuys, California made TV lamps by the thousand in the 1950s. A specialist...
LightingThe Aladdin lamp: a federal court split the name in two, and the split never healed
The ALADDIN trademark was filed in 1908, a year before the company's first lamp. A 1935 federal ruling...
LightingThe architect lamp: how to tell an Anglepoise from a Luxo, and date either one from the base
One British patent, two licensed brands, and a base that dates the lamp. How to date an Anglepoise...
LightingThe woman who designed the Tiffany lamp, and how to tell a real one from a Tiffany style one
Tiffany style is a look, not a maker. Here is what a genuine Tiffany Studios mark does and...
LightingThe green banker's lamp: how to tell an Emeralite from the $46 copy
Harrison D. McFaddin patented the green shade in 1909 and waited twelve years to register the name. By...
LightingThe Garfield desk lamp: a ceramic cat's head on a gooseneck, sold in a cardboard house
Prestigeline's PT-5655 was a real desk lamp with a hand-decorated ceramic shade — and its house-shaped carton is...
LightingVintage lava lamps: the man in the pub had a patent
The received story is wrong three times over. Donald Dunnett patented the lava lamp in 1950 and died...
LightingVintage TV lamps: how to identify and date one
America briefly believed watching television in the dark would ruin your eyes. An entire industry appeared to fix...
LightingRetro lighting: the bulb is half the fixture
Every vintage lamp was designed around a 2700K bulb. Get that number right, layer three sources at three...