Inventor
FRIEDMAN WILLIAM J
US10 patents
⚠️ This page may combine multiple inventors who share the name “FRIEDMAN WILLIAM J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SEALAND TECHNOLOGY INC
9 patentsUS5931642AAug 3, 1999
Plastic combined vacuum and holding tank
SEALAND TECHNOLOGY INC27 citations92
US5681148AOct 28, 1997
Vacuum/holding tank
SEALAND TECHNOLOGY INC24 citations92
US6082979AJul 4, 2000
Air pump for vacuum toilet systems
SEALAND TECHNOLOGY INC26 citations91
US6234197B1May 22, 2001
Holding tank vacuum relief
SEALAND TECHNOLOGY INC19 citations83
US6065493AMay 23, 2000
Vacuum relief valve for sewage holding tank
SEALAND TECHNOLOGY INC11 citations73
US5860799AJan 19, 1999
Pulsation damper for marine tank pumpout systems
SEALAND TECHNOLOGY INC11 citations68
US5806454ASep 15, 1998
Discharge hose adapter for boat holding tank
SEALAND TECHNOLOGY INC5 citations62
US6216284B1Apr 17, 2001
Low odor permeable hose
SEALAND TECHNOLOGY INC3 citations60
US5939160AAug 17, 1999
Low odor permeable hose
SEALAND TECHNOLOGY INC3 citations60