| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | France | 4 | |
| #3 | United Kingdom | 3 | |
| #4 | Austria | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Packaging and shipping | |
| #4 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies | |
| #3 | Cranes | |
| #4 | Tools for connecting or disengaging |
| # | Name | Total Patents |
|---|---|---|
| #1 | Wilson William A | 2 |
| #2 | Palmer Melvin J | 2 |
| #3 | Hilliard Benjamin A | 1 |
| #4 | Grundmann John F | 1 |
| #5 | Bujold Victor N | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB895311A | An elevator for handling well pipes and the like | |
| GB862411A | Improvements in elevators for handling pipes and the like in wells | |
| GB915683A | Gripping dies | |
| US2962919A | Gripping dies for pipe wrenches and similar devices | |
| US2957724A | Tool safety latch | |
| US2814087A | Drill pipe slip | |
| US2814522A | Connector-hook | |
| US2517366A | Pipe tong die |