Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5030190 | Gussetted plastic bags having relief seals and method of making same | Fred Stevenson, R. Douglas Behr | 1991-07-09 |
| 4913761 | Method for severing and sealing thermoplastic materials | Patrick M. Russell, Roger K. Pihlaja | 1990-04-03 |
| 4904093 | Gussetted plastic bags having relief seals and method of making same | Fred Stevenson, R. Douglas Behr | 1990-02-27 |
| 4812192 | Process and apparatus for cutting and sealing multiple plies of thermoplastic material having thickened sections | R. Douglas Behr | 1989-03-14 |