Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D355134 | Spirit level | — | 1995-02-07 |
| 5127167 | Multi-function spirit-level | — | 1992-07-07 |
| D320360 | Spirit level | — | 1991-10-01 |
| 4653193 | Polyfunctional spirit-level | Loren R. Wilson | 1987-03-31 |