| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 12 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies | |
| #3 | Unspecified technologies | |
| #4 | Making metal sheets | |
| #5 | Grinding or polishing devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Block Harold C | 3 |
| #2 | Roco Albert L | 2 |
| #3 | Bean Ruric N | 2 |
| #4 | Park Tracy S | 2 |
| #5 | Mundt Louis C | 2 |
| #6 | Ernest Wilkinson | 1 |
| #7 | Vernon Walters William | 1 |
| #8 | Westrum Colby Van | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2724442A | Full opening valve with elastic, self sealing closure means | |
| US2237544A | Collapsing tool seal | |
| US2155382A | Hydraulic release for well bottoms | |
| US2155380A | Packer lock | |
| US2178549A | Tubing hanger | |
| US2155744A | Well strainer | |
| US2174803A | Burr roller | |
| US2120988A | Screen washer | |
| US2144026A | Packer | |
| US2153822A | Wash line drive connection | |
| US2072430A | Set shoe | |
| US1842705A | Releasing spear |