Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5416102 | Method of preventing the reinfestation of dogs and cats by fleas | Roland Johnson, Douglas I. Hepler, Manfred Boger | 1995-05-16 |
| 4973589 | Method of preventing the reinfestation of dogs and cats by fleas | Roland Johnson, Douglas I. Hepler | 1990-11-27 |