Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5897840 | Multi-chambered urine specimen container for automatic extraction and high forensic integrity | Arthur Neal Owens, Jr., Eric Hassenpflug, David A. Fingerhuth, John F. Jemionek, Thomas A. Pettenski | 1999-04-27 |
| 4848165 | Smear sampling apparatus | Kenneth D. Kok, Thomas A. Pettenski | 1989-07-18 |
| 4584861 | Knurling tool | Richard D. Kreachbaum, Thomas A. Pettenski, John T. Voedisch | 1986-04-29 |
| 4299515 | Rock reinforcement system | Jan B. Yates | 1981-11-10 |