Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4472143 | Method for securing doors, and the like | Owen E. Hearold | 1984-09-18 |
| D274124 | Holder and release device for a chain lock | Owen E. Hearold | 1984-06-05 |
| 4392184 | Illuminating method and apparatus for carpenter's or mechanic's levels | Owen E. Hearold | 1983-07-05 |