Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11697933 | Connector pipe screen with expandable ring mounting assembly | — | 2023-07-11 |
| 10683655 | Expansion ring mountable in a storm drain for supporting a filtering apparatus | Mario Szczepanski | 2020-06-16 |
| 9045891 | Stormwater treatment system | John E. Markee | 2015-06-02 |
| 9017552 | Garden runoff treatment system | John E. Markee | 2015-04-28 |
| 8623203 | Stormwater treatment system | John E. Markee | 2014-01-07 |
| 8438731 | Method of using step flange catch basin adaptor | John E. Markee | 2013-05-14 |
| 8168064 | Step flange catch basin adaptor and method of using | John E. Markee | 2012-05-01 |
| 8012346 | Storm sewer insert for filtering and treating stormwater | John E. Markee | 2011-09-06 |
| 7837869 | System for filtering stormwater | John E. Markee | 2010-11-23 |
| 7332091 | Process for treating storm water | John E. Markee | 2008-02-19 |
| 7160444 | System for removing contaminants from storm water | John E. Markee | 2007-01-09 |
| 6639895 | Fault tolerant network switch | Michael A.. Helles, William E. Mahuson | 2003-10-28 |
| 6581244 | Hinge construction, especially for items of jewellery | — | 2003-06-24 |
| 6327921 | Non-destructive inspections and the display of inspection results | David K. Hsu, Daniel J. Barnard, Nordica A. Hudelson | 2001-12-11 |
| 6253432 | Method of setting small objects in malleable sheet material and apparatus for carrying out the method | John Grinnel | 2001-07-03 |
| 6042721 | Effluent treatment apparatus | James McManus | 2000-03-28 |
| 5955713 | Tilt switch array for electronic orientation detection | John S. Titus, Leonard P. Tetrault | 1999-09-21 |
| 4298209 | Detachable roller skate with rear brake | — | 1981-11-03 |