| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 74 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Machine tools | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies | |
| #3 | Unspecified technologies | |
| #4 | Tools for connecting or disengaging | |
| #5 | Blasting | |
| #6 | Pipes | |
| #7 | Belts or cables for driving |
| # | Name | Total Patents |
|---|---|---|
| #1 | Johnston Mordica O | 13 |
| #2 | Moosman Jack A | 12 |
| #3 | Bagnell Edgar W | 11 |
| #4 | Long Thomas L | 8 |
| #5 | O'Neill Frank E | 6 |
| #6 | Nutter Benjamin P | 6 |
| #7 | Ansite William K | 4 |
| #8 | Huber Clyde L | 4 |
| #9 | Garrison Marion A | 4 |
| #10 | Bettis Wilbur F | 3 |
| Publication | Filing date | Title |
|---|---|---|
| US3061012A | Well packers | |
| US3015362A | Well apparatus | |
| US3019842A | Well packer | |
| US3065796A | Multiple purpose well tools | |
| US3020959A | Well packers | |
| US3051245A | Well tools for subsurface flow control | |
| US3036641A | Adjustable anchors | |
| US2881842A | Safety device | |
| US2981336A | Jar | |
| US2854082A | Well testing tool | |
| US2878876A | Well packing tool | |
| US3004616A | Jar | |
| US2944606A | Filling device | |
| US2877027A | High pressure hose coupling with pressure-wedged sealing means | |
| US2829441A | Bottom caliper support | |
| US2797759A | Anti-extrusion device for packers | |
| US2947363A | Fill-up valve for well strings | |
| US2874782A | Doughnut-type packer | |
| US2863511A | Back circulating valve | |
| US2923562A | Latch structure |