Inventor
SARGENT CHARLES L
US36 patents
⚠️ This page may combine multiple inventors who share the name “SARGENT CHARLES L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
THETFORD CORP
25 patentsUS4776631AOct 11, 1988
Self-contained RV sanitary systems
THETFORD CORP63 citations96
US4305164ADec 15, 1981
Portable toilet facility
THETFORD CORP63 citations96
US4944048AJul 31, 1990
Self-contained RV sanitary system
THETFORD CORP25 citations93
US5247974ASep 28, 1993
Pneumatic sealing device for waste disposal systems
THETFORD CORP35 citations92
US5060320AOct 29, 1991
Recreational vehicle toilet with foot pedal flush
THETFORD CORP32 citations92
US5031249AJul 16, 1991
Universal recreational vehicle toilet system with removable holding tank
THETFORD CORP41 citations92
US5010602AApr 30, 1991
Toilet with pulsed flow of flush water
THETFORD CORP25 citations92
US4974899ADec 4, 1990
Recreational vehicle use system particularly tank installation
THETFORD CORP40 citations92
US4779650AOct 25, 1988
Telescoping drain assembly for recreational vehicles
THETFORD CORP42 citations92
US5073994ADec 24, 1991
Low water toilet with pulsed flush
THETFORD CORP30 citations89
US5056166AOct 15, 1991
Self-contained RV sanitary systems
THETFORD CORP19 citations82
US4926508AMay 22, 1990
Portable toilet with battery operated flush assembly
THETFORD CORP21 citations82
US4906033AMar 6, 1990
RV door assembly
THETFORD CORP22 citations82
US4892349AJan 9, 1990
Toilet system with removable holding tank for recreational vehicles
THETFORD CORP22 citations82
US4751753AJun 21, 1988
Portable toilet enclosure
THETFORD CORP21 citations82
US4217668AAug 19, 1980
Portable toilet
THETFORD CORP24 citations81
USD287937SJan 27, 1987
Bottle
THETFORD CORP18 citations78
US6158061ADec 12, 2000
Sanitary toilet with integral water supply and manual flush assembly
THETFORD CORP12 citations74
USD262051SNov 24, 1981
Portable toilet
THETFORD CORP9 citations73
USD256722SSep 2, 1980
Toilet
THETFORD CORP12 citations73
US5318275AJun 7, 1994
Portable waste holding tank with improved inlet valve assembly
THETFORD CORP15 citations72
US4769860ASep 13, 1988
Portable toilet holding tank spout
THETFORD CORP10 citations72
US4641383AFeb 10, 1987
Portable toilet holding tank spout
THETFORD CORP14 citations72
US4462124AJul 31, 1984
Flush apparatus for water closet and method of operation
THETFORD CORP19 citations70
US4096067AJun 20, 1978
Volume displacement rod and holder
THETFORD CORP6 citations60
QUALITY BOAT LIFTS INC
8 patentsUS5833417ANov 10, 1998
Adjustable clamping assembly
QUALITY BOAT LIFTS INC96 citations97
US6543375B1Apr 8, 2003
Solar powered boat lift
QUALITY BOAT LIFTS INC52 citations92
US5988941ANov 23, 1999
Boat lift cable lock apparatus
QUALITY BOAT LIFTS INC31 citations92
US6408776B1Jun 25, 2002
Synchronously driven, multiple cable boat lift
QUALITY BOAT LIFTS INC22 citations91
US6230639B1May 15, 2001
Single motor boat lift having horizontally and longitudinally driven cables
QUALITY BOAT LIFTS INC30 citations91
US6709197B1Mar 23, 2004
Large capacity boat lift
QUALITY BOAT LIFTS INC19 citations83
US5957623ASep 28, 1999
Electrically insulated positive drive boat lift
QUALITY BOAT LIFTS INC15 citations73
US6640736B1Nov 4, 2003
Synchronously driven, multiple cable boat lift
QUALITY BOAT LIFTS INC9 citations72