| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 15 | |
| #2 | Canada | 14 | |
| #3 | Germany | 10 | |
| #4 | United Kingdom | 10 | |
| #5 | Netherlands | 7 | |
| #6 | France | 6 | |
| #7 | Japan | 6 | |
| #8 | Australia | 2 | |
| #9 | Belgium | 2 | |
| #10 | Finland | 2 | |
| #11 | Brazil | 1 | |
| #12 | Italy | 1 |
| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping | |
| #2 | Civil engineering | |
| #3 | Machines | |
| #4 | Machine tools | |
| #5 | Consumer goods | |
| #6 | Organic fine chemistry |
| # | Name | Total Patents |
|---|---|---|
| #1 | Renfroe Raymond L | 16 |
| #2 | Renfroe Charles J | 9 |
| #3 | Davies William | 6 |
| #4 | Renfroe Josh L | 5 |
| #5 | Uiriamu Deebisu | 4 |
| #6 | Leon Renfroe Raymond | 4 |
| #7 | Renfroe R L | 2 |
| #8 | O'Quinn Paul V | 2 |
| #9 | Renfroe R | 1 |
| #10 | Lee Renfroe Josh | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4850630A | Clamp with movable jaw structure | |
| US3659890A | Lifting clamp | |
| US3632152A | Hinged clamp | |
| US3424488A | Modified x-frame lifting apparatus | |
| US3476360A | Quick pry tools | |
| FR1518301A | Lifting clamp | |
| US3414315A | Lifting clamp | |
| FR1482695A | Lifting spike | |
| FR1482696A | Advanced lifting crampon | |
| GB1141018A | Safety clamp | |
| FR1477088A | Safety clamp | |
| US3370881A | Lifting clamp | |
| US3297354A | Lifting clamp | |
| US3342521A | Torque grip lifting clamp | |
| FR1438907A | Lifting clamp | |
| GB1048337A | Lifting clamp | |
| US3336068A | Lifting clamp | |
| US3356406A | Lifting clamp | |
| US3274657A | Safety clamp | |
| US3163457A | Lifting clamps |