| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 7 | |
| #2 | Canada | 3 | |
| #3 | Netherlands | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Consumer goods | |
| #3 | Machines | |
| #4 | Audio-visual technology |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Perforating | |
| #3 | Filing and indexing | |
| #4 | Cutting | |
| #5 | Hand carried bags | |
| #6 | Advertising |
| # | Name | Total Patents |
|---|---|---|
| #1 | Neilsen Hildaur L | 6 |
| #2 | Davi Richard A | 5 |
| #3 | Ruskin Henry | 1 |
| #4 | Nielsen Hildaur L | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4688457A | Heavy duty paper punch | |
| US4713995A | Hole punch assembly | |
| CA1213822A | Heavy duty paper punch | |
| US4906057A | Closed portable card file | |
| US4231624A | Locking rotary file | |
| CA1101294A | Rotary card holder | |
| US4165575A | Rotary card file | |
| US4036088A | Paper punch with variable spacing | |
| US4035938A | Rotary card holder |