Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8656524 | Toilet assembly | — | 2014-02-25 |
| 7725961 | Portable toilet | Miguel Martinez, Patrick J. Curran, Otto E. Erbacher, Robert D. Krieder | 2010-06-01 |
| 6957450 | Standardized recreational vehicle sanitary system | James A. Sigler | 2005-10-25 |
| 6782561 | Standardized recreational vehicle sanitary system | James A. Sigler | 2004-08-31 |
| 6234197 | Holding tank vacuum relief | James A. Sigler, William J. Friedman | 2001-05-22 |
| 6182673 | Dump facility for cassette sewage tanks | Mike Kindermann, Dieter Kolodziej, Michael Schinkmann | 2001-02-06 |
| 6065493 | Vacuum relief valve for sewage holding tank | William J. Friedman, James A. Sigler | 2000-05-23 |
| 5971005 | Vacuum adaptor for recreation vehicle toilet system with sliding cassette holding tank | James A. Sigler | 1999-10-26 |
| 5937888 | Toilet waste collection system for campgrounds | James A. Sigler | 1999-08-17 |
| 5931642 | Plastic combined vacuum and holding tank | William J. Friedman, James A. Sigler | 1999-08-03 |
| 5806454 | Discharge hose adapter for boat holding tank | James A. Sigler, William J. Friedman | 1998-09-15 |
| 5681148 | Vacuum/holding tank | William J. Friedman, James A. Sigler | 1997-10-28 |
| 5442952 | Testing of hoses | Frederic J. Morris | 1995-08-22 |
| 5433163 | Pump out adaptor | — | 1995-07-18 |
| 5345618 | Vacuum toilet system | James A. Sigler, Richard W. Sprang, Ronald J. Bailey | 1994-09-13 |
| 5079950 | Level indicating in vehicle holding tanks | Ronald J. Bailey, James A. Sigler | 1992-01-14 |
| 4893720 | Tilting sanitary tank | Carl E. Bochmann | 1990-01-16 |
| 4854827 | Sanitary pump station | James A. Sigler, Richard W. Sprang, Richard R. Lewellen, Mark W. Geis | 1989-08-08 |
| 4819279 | Vacuum toilet system | James A. Sigler, Richard W. Sprang, Ronald J. Bailey | 1989-04-11 |