| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 17 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Engines, pumps and turbines | |
| #4 | Environmental technology |
| # | Name | Total Patents |
|---|---|---|
| #1 | Layne Leslie A | 12 |
| #2 | Block Harold C | 8 |
| #3 | Layne Mahlon E | 5 |
| #4 | Hall Samuel N | 5 |
| #5 | Mundt Louis C | 3 |
| #6 | Roco Albert L | 3 |
| #7 | Bean Rurice N | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2743087A | Under-reaming tool | |
| US2155381A | Bottom connection hydraulic setting tool | |
| US2197403A | Bottom connection screw through setting tool | |
| US2243967A | Packer and setting tool | |
| US2169561A | Automatic bleeder | |
| US2096904A | Graveling tool | |
| US2155718A | Wash-pipe anchor | |
| US2120981A | Screw off packer | |
| US2082112A | Casing packer | |
| US2082113A | Well packer | |
| US2040263A | Detachable blade bit | |
| US1870779A | Setting tool | |
| US1499383A | Well mechanism | |
| US1415587A | Well mechanism | |
| US1447992A | Well mechanism | |
| US1415586A | Well mechanism | |
| US1415585A | Well mechanism |