Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5662576 | Method of manufacturing an improved bag for the cultivation of mushroom spawn and apparatus therefor | Gregory S. Sprehe, Lester Siebert | 1997-09-02 |
| 5659997 | Bag for the cultivation of mushroom spawn | Gregory S. Sprehe, Lester Siebert | 1997-08-26 |