Inventor
SCHEFFEL GARY W
US15 patents
⚠️ This page may combine multiple inventors who share the name “SCHEFFEL GARY W”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NUPRO CO
12 patentsUS4671490AJun 9, 1987
Diaphragm valve
NUPRO CO79 citations95
US4964423AOct 23, 1990
Check valve
NUPRO CO27 citations92
US4856555AAug 15, 1989
Check valve
NUPRO CO24 citations92
US4840191AJun 20, 1989
Inflatable valve
NUPRO CO31 citations92
US4790348ADec 13, 1988
Low pressure relief valve
NUPRO CO29 citations92
US4750709AJun 14, 1988
Diaphragm valve
NUPRO CO53 citations92
US4732363AMar 22, 1988
Diaphragm valve
NUPRO CO32 citations92
US4637430AJan 20, 1987
Check valve
NUPRO CO42 citations92
US4659061AApr 21, 1987
Seal ring shutoff stem tip
NUPRO CO20 citations82
US4687180AAug 18, 1987
Metering valve
NUPRO CO19 citations81
US4659060AApr 21, 1987
Stem tip seal
NUPRO CO13 citations73
US4687181AAug 18, 1987
Metering valve
NUPRO CO14 citations68