Issued Patents All Time
Showing 25 most recent of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11186433 | Underground storage tank | — | 2021-11-30 |
| 7744161 | System and method for modular furniture assembly | Thomas Berg | 2010-06-29 |
| 7337590 | Tank retaining system | John Burwell, Douglas Morrissette, David Grams | 2008-03-04 |
| 7028967 | Tank retaining system | John Burwell, Douglas Morrissette, David Grams | 2006-04-18 |
| 6889865 | Method and apparatus for pressure testing storage tanks | John Burwell, Don C. Abel, Chester Batzkiel, Greg Carty, Onesimo Gomez +2 more | 2005-05-10 |
| 6820762 | High strength rib for storage tanks | — | 2004-11-23 |
| 6698610 | Triple walled underground storage tank | John Burwell, Albert F. Dorris, John Smith | 2004-03-02 |
| 6626320 | Double walled underground storage tank and method for making the same | — | 2003-09-30 |
| 6564614 | Method and apparatus for vacuum testing water resistant and watertight risers and lids | Albert F. Doris, Douglas Morrissette, James S. Anderson | 2003-05-20 |
| 6558535 | Residential septic tank with seams above sewage line and residential septic tank with stepped ribs | Kaushik Mallick, Brian Garcia, Michael Zais | 2003-05-06 |
| 6551024 | System and method for detecting leaks in underground storage tank | John Burwell, Richard J. Kelber | 2003-04-22 |
| 6516740 | Lift-off cover assembly for a barge | Roderick Annis | 2003-02-11 |
| 6467344 | Underground storage tank buoyancy and buoyancy safety factor calculation method and apparatus | Kiet Tuong Ly, John Burwell, Albert F. Dorris | 2002-10-22 |
| 6443084 | Telescoping and rolling cover assembly for a barge | Brian Garcia, Kaushik Mallick, Roderick Annis | 2002-09-03 |
| 6398057 | Triple walled underground storage tank | John Burwell, Albert F. Dorris, John Smith | 2002-06-04 |
| 6397168 | Seismic evaluation method for underground structures | Joseph Plecnik, Albert F. Dorris | 2002-05-28 |
| 6352046 | Telescoping and rolling cover assembly for a barge | Brian Garcia, Kaushik Mallick, Roderick Annis | 2002-03-05 |
| 6280614 | Residential septic tank | Kaushik Mallick, Brian Garcia, Michael Zais | 2001-08-28 |
| 6167608 | Tank upgrading method and tank assembly | John Burwell, John M. Clark | 2001-01-02 |
| 6161493 | Lift-off cover assembly for a barge | — | 2000-12-19 |
| 6138597 | Lift-off cover assembly for a barge | — | 2000-10-31 |
| 6016761 | Lift-off cover assembly for a barge | — | 2000-01-25 |
| 5803304 | Underground storage tank | — | 1998-09-08 |
| 5720404 | Female-molded underground storage tank and method of making | John Burwell, Neil Olson, John Smith | 1998-02-24 |
| 5595456 | Water-tight riser for underground storage tank manway | Mark Baumgartner | 1997-01-21 |