Inventor
HALL JOHN E
9 patents
⚠️ This page may combine multiple inventors who share the name “HALL JOHN E”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HALL JOHN E
6 patentsUS5195985AMar 23, 1993
Syringe having a retractable needle
HALL JOHN E370 citations98
US4946440AAug 7, 1990
Evertible membrane catheter and method of use
HALL JOHN E678 citations98
US4779722AOct 25, 1988
Material mixing container
HALL JOHN E161 citations97
US4935015AJun 19, 1990
Syringe apparatus with retractable needle
HALL JOHN E74 citations95
US4762224AAug 9, 1988
Mixing container with segregated ingredient compartments
HALL JOHN E24 citations81
US4268387AMay 19, 1981
Filtration system
HALL JOHN E19 citations72