Inventor

GRANDY JOHN

US3 patents

⚠️ This page may combine multiple inventors who share the name “GRANDY JOHN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

SAMPSON MACHINE COMPANY

2 patents

US4909892AMar 20, 1990

Apparatus for welding thermoplastic frame members

SAMPSON MACHINE COMPANY57 citations90

US4971639ANov 20, 1990

Method and apparatus for joining polymeric substrates such as vinyl frames

SAMPSON MACHINE COMPANY42 citations89

GRANDY JOHN

1 patent

US4828239AMay 9, 1989

Frame piece joining apparatus and jig therefor

GRANDY JOHN9 citations64