Inventor
MARTIN JOHN K
US20 patents
⚠️ This page may combine multiple inventors who share the name “MARTIN JOHN K”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MARTIN JOHN K
7 patentsUS4150672AApr 24, 1979
Injection device and method
MARTIN JOHN K162 citations96
US4899933AFeb 13, 1990
Railway crossing insert
MARTIN JOHN K32 citations92
USD301435SJun 6, 1989
Railway crossing insert
MARTIN JOHN K7 citations73
US4793615ADec 27, 1988
Puzzle with movable pieces
MARTIN JOHN K13 citations73
US10011954B1Jul 3, 2018
Rail seat crown and concrete rail tie having the same
MARTIN JOHN K1 citations51
USD340084SOct 5, 1993
Chance game
MARTIN JOHN K0 citations51
USD302409SJul 25, 1989
Rail insulator
MARTIN JOHN K0 citations51