Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE43772 | Seed tube for an agricultural seeding machine | Nathan A. Mariman, Mark Sommer, James R. Peterson, Donald K. Landphair | 2012-10-30 |
| 7472660 | Seed tube for an agricultural seeding machine | Nathan A. Mariman, Mark Sommer, James R. Peterson, Donald K. Landphair | 2009-01-06 |
| 5398895 | Cord holder and support | Allen H. Whetherhult | 1995-03-21 |