| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 12 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Machines | |
| #3 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Hand-held cutting tools | |
| #2 | Grinding tools | |
| #3 | Unspecified technologies | |
| #4 | Buttons, pins and buckles | |
| #5 | Sawing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Collins Walter W | 12 |
| Publication | Filing date | Title |
|---|---|---|
| US7146736B1 | Folding knife with cantilevered spring | |
| US7246441B1 | Convertible knife system | |
| US6951055B1 | Folding utility knife | |
| US5297341A | Locking knife and sheath | |
| US5111581A | Bolt operated locking mechanism for folding knife | |
| US5155911A | Knife and sheath locking mechanism | |
| US5092046A | Knife and sheath system | |
| US4558540A | Knife sharpener | |
| US4451982A | Bolt action knife | |
| US4389775A | Belt buckle and knife | |
| US3930309A | Ring lock knife | |
| US3900950A | Knife with removable blade |