Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4918785 | Mechanical knot for ropes | Ralphael F. Spinner, deceased, by Sara C. Grant, by Mary Brown | 1990-04-24 |
| 4885842 | Guard and guide for corn cutters | — | 1989-12-12 |
| 4872240 | Steel knot for ropes | Raphael F. Spinner, Mary Brown, Cathy Grant | 1989-10-10 |
| 4573232 | Mechanical chimney sweep control | — | 1986-03-04 |