| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 23 | |
| #2 | South Africa | 3 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Transport | |
| #3 | Machines | |
| #4 | Electrical machinery and energy | |
| #5 | Mechanical elements |
| # | Name | Total Patents |
|---|---|---|
| #1 | Gurney Albert J | 15 |
| #2 | Chorman Robert H | 4 |
| #3 | Zenisek Daniel S | 4 |
| #4 | Robert H Chorman | 3 |
| #5 | Daniel S Zenisek | 3 |
| #6 | Charles Vignos | 1 |
| #7 | Kirk Edward C | 1 |
| #8 | Harry Prince | 1 |
| #9 | Miller James B | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2014022077A1 | Control system for mine ventilation door | |
| US1729719A | Closing mechanism for mine doors | |
| US1748448A | Mine door | |
| US1764113A | Apparatus for rock dusting mines | |
| US1705518A | Relay | |
| US1748447A | Operating mechanism for mine doors | |
| US1666493A | Wire anchor | |
| US1608061A | Wire hanger | |
| US1608062A | Wire hanger | |
| US1603459A | Wire hanger | |
| US1608063A | Wire hanger | |
| US1541493A | Wire hanger | |
| US1534703A | Wire hanger | |
| US1646660A | Cable splice | |
| US1523805A | Signaling system for mines | |
| US1523806A | Trolley and signal wire hanger | |
| US1536841A | Trolley and signal wire hanger | |
| US1658983A | Signal-wire hanger | |
| US1565831A | Cable splice | |
| US1655706A | Cable splice |