WF

William J. Friedman

BA Bellandtechnology Ag: 10 patents #3 of 36Top 9%
📍 Big Prairie, OH: #1 of 7 inventorsTop 15%
🗺 Ohio: #8,027 of 73,341 inventorsTop 15%
Overall (All Time): #525,407 of 4,157,543Top 15%
10
Patents All Time

Issued Patents All Time

Showing 1–10 of 10 patents

Patent #TitleCo-InventorsDate
6234197 Holding tank vacuum relief Edward McKiernan, James A. Sigler 2001-05-22
6216284 Low odor permeable hose Sally A. Kline 2001-04-17
6082979 Air pump for vacuum toilet systems 2000-07-04
6065493 Vacuum relief valve for sewage holding tank Edward McKiernan, James A. Sigler 2000-05-23
5939160 Low odor permeable hose Sally A. Kline 1999-08-17
5931642 Plastic combined vacuum and holding tank James A. Sigler, Edward McKiernan 1999-08-03
5860799 Pulsation damper for marine tank pumpout systems Mark E. Scheibe, James A. Sigler 1999-01-19
5806454 Discharge hose adapter for boat holding tank Edward McKiernan, James A. Sigler 1998-09-15
5681148 Vacuum/holding tank James A. Sigler, Edward McKiernan 1997-10-28
5621924 Vacuum tank construction for a vacuum toilet assembly James A. Sigler 1997-04-22