| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 15 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Civil engineering | |
| #3 | Engines, pumps and turbines | |
| #4 | Machines | |
| #5 | Mechanical elements | |
| #6 | Furniture and games |
| # | Technology | |
|---|---|---|
| #1 | Tools for connecting or disengaging | |
| #2 | Earth drilling | |
| #3 | Pumps | |
| #4 | Unspecified technologies | |
| #5 | Shafts | |
| #6 | Chairs and beds | |
| #7 | Pipes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hall Samuel N | 17 |
| #2 | Petersen Carl M | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2177485A | Pipe wrench | |
| US1424640A | Thrust bearing | |
| US1333251A | Pipe-wrench | |
| US1212481A | Bit-brace. | |
| US1212480A | Bit-brace. | |
| US1212479A | Hydraulic bed. | |
| US1107938A | Bit-brace. | |
| US1107937A | Pipe-wrench. | |
| US1107936A | Wrench. | |
| US956081A | Rotary for well-tubing. | |
| US956080A | Well-screen. | |
| US822272A | Well-drilling apparatus. | |
| US780993A | Pump. | |
| US780992A | Pump. | |
| US1050533A | Well-drilling mechanism. | |
| CA199300A | Pipe wrench | |
| CA204292A | Pipe wrench |