Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4906057 | Closed portable card file | Richard A. Davi | 1990-03-06 |
| 4898055 | Adjustable multiple paper punch | — | 1990-02-06 |
| 4829867 | Paper punch apparatus with improved punch element | — | 1989-05-16 |
| 4688457 | Heavy duty paper punch | Richard A. Davi | 1987-08-25 |
| 4662199 | Key retaining device | — | 1987-05-05 |
| 4570469 | Key retaining device | — | 1986-02-18 |
| 4448051 | Key retaining device | — | 1984-05-15 |
| 4441348 | Key retaining device | — | 1984-04-10 |
| D265659 | Combined card file and curved top cards | Martin Glaubinger | 1982-08-03 |
| D258669 | Rotary card file | — | 1981-03-24 |
| 4253223 | Deburring devices | — | 1981-03-03 |
| 4231624 | Locking rotary file | — | 1980-11-04 |