Inventor
MARSHALL JOHN M
8 patents
⚠️ This page may combine multiple inventors who share the name “MARSHALL JOHN M”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MARSHALL JOHN M
4 patentsUS5211628AMay 18, 1993
Syringe with automatic retracting needle
MARSHALL JOHN M181 citations96
US4848138AJul 18, 1989
Window gas monitor
MARSHALL JOHN M18 citations71
US4633233ADec 30, 1986
Window security device
MARSHALL JOHN M4 citations61
US4755800AJul 5, 1988
Window security device
MARSHALL JOHN M6 citations57