Issued Patents All Time
Showing 1–25 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7373946 | Vacuum tank assembly | Lorna K. Edmondson, Steven L. Miko | 2008-05-20 |
| 6981285 | Toilet and method of operation | Nathan A. Snyder, Robert D. Krieder, Steven L. Miko, Randall Thomas | 2006-01-03 |
| 6957450 | Standardized recreational vehicle sanitary system | Edward McKiernan | 2005-10-25 |
| 6883188 | Toilet and method of operation | Nathan A. Snyder, Robert D. Krieder, Steven L. Miko, Randall Thomas | 2005-04-26 |
| 6782561 | Standardized recreational vehicle sanitary system | Edward McKiernan | 2004-08-31 |
| 6234197 | Holding tank vacuum relief | Edward McKiernan, William J. Friedman | 2001-05-22 |
| 6148860 | Low volume vacuum toilet assembly | — | 2000-11-21 |
| 6065493 | Vacuum relief valve for sewage holding tank | William J. Friedman, Edward McKiernan | 2000-05-23 |
| 5971005 | Vacuum adaptor for recreation vehicle toilet system with sliding cassette holding tank | Edward McKiernan | 1999-10-26 |
| 5960829 | No drip vacuum tight connector | — | 1999-10-05 |
| 5947047 | Seacock interlocking | — | 1999-09-07 |
| 5947146 | Low volume vacuum toilet assembly | Ronald J. Bailey, Fred Leroy Lint, Pamela Kay Snyder | 1999-09-07 |
| 5937888 | Toilet waste collection system for campgrounds | Edward McKiernan | 1999-08-17 |
| 5931642 | Plastic combined vacuum and holding tank | William J. Friedman, Edward McKiernan | 1999-08-03 |
| 5860799 | Pulsation damper for marine tank pumpout systems | Mark E. Scheibe, William J. Friedman | 1999-01-19 |
| 5806454 | Discharge hose adapter for boat holding tank | Edward McKiernan, William J. Friedman | 1998-09-15 |
| 5681148 | Vacuum/holding tank | William J. Friedman, Edward McKiernan | 1997-10-28 |
| 5621924 | Vacuum tank construction for a vacuum toilet assembly | William J. Friedman | 1997-04-22 |
| 5432958 | Readily detachable cylindrical sections valve | Carl E. Bochmann, Cherry Bochmann | 1995-07-18 |
| 5408704 | Low volume vacuum toilet assembly | Ronald J. Bailey, Fred Leroy Lint, Pamela Kay Snyder | 1995-04-25 |
| 5345618 | Vacuum toilet system | Richard W. Sprang, Edward McKiernan, Ronald J. Bailey | 1994-09-13 |
| 5139655 | Integrated system marine sanitation device | — | 1992-08-18 |
| 5079950 | Level indicating in vehicle holding tanks | Edward McKiernan, Ronald J. Bailey | 1992-01-14 |
| 4854827 | Sanitary pump station | Edward McKiernan, Richard W. Sprang, Richard R. Lewellen, Mark W. Geis | 1989-08-08 |
| 4819279 | Vacuum toilet system | Richard W. Sprang, Ronald J. Bailey, Edward McKiernan | 1989-04-11 |