E. J. Gearhart, "Semiautomatic Turfing Device" (US1912977A)
Patent · not yet checked at the source
- Made by
- E. J. Gearhart
- Date
- filed 11 Aug 1931, granted 6 Jun 1933
- Number
- US1912977A
- Themes
- Hand-tufting tools & the gun, Tools & equipment, Hooked & handmade rugs
Cite this source
E. J. Gearhart, “Semiautomatic Turfing Device” (US1912977A), filed 11 Aug 1931, granted 6 Jun 1933. patents.google.com/patent/US1912977A/en.
Research notes
Later cited as punch-needle prior art. Patent research (Oct 2026): number, title, names and dates read from the USPTO scan.