Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9221006 | Oxygen concentrator having structural sieve beds | Dennis J. Sniezek, Thomas Sprinkle | 2015-12-29 |
| 8562725 | Oxygen concentrator having structural sieve beds | Dennis J. Sniezek, Thomas Sprinkle | 2013-10-22 |
| 8282717 | Oxygen concentrator having structural sieve beds | Dennis J. Sniezek, Thomas Sprinkle | 2012-10-09 |
| 7875105 | Oxygen concentrator having structural sieve beds | Dennis J. Sniezek, Thomas Sprinkle | 2011-01-25 |
| D379970 | Cover for electrical boxes | David P. Marshall | 1997-06-17 |
| D379176 | Cover for electrical boxes | David P. Marshall | 1997-05-13 |
| 5626373 | Draw latch assembly | Mark S. Coats | 1997-05-06 |
| D378913 | Cover for electrical boxes | David P. Marshall | 1997-04-22 |
| 5084596 | Electrical box | Richard J. Borsh, Philip G. Bartone | 1992-01-28 |
| 4275849 | Macerator | — | 1981-06-30 |