| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 7 | |
| #2 | Spain | 2 | |
| #3 | Australia | 1 | |
| #4 | Canada | 1 | |
| #5 | Germany | 1 | |
| #6 | United Kingdom | 1 | |
| #7 | Italy | 1 | |
| #8 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Thermal processes | |
| #3 | Machines | |
| #4 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Non-positive-displacement pumps | |
| #2 | Air-conditioning | |
| #3 | Unspecified technologies | |
| #4 | Steam turbines | |
| #5 | Fire-fighting | |
| #6 | Supplying fuel to combustion device |
| # | Name | Total Patents |
|---|---|---|
| #1 | Mckelvey Wilfred G | 4 |
| #2 | Korff Wolfram G | 4 |
| #3 | Mc Kelvey Wilfred George | 1 |
| #4 | Mckelvey W G | 1 |
| #5 | Kastner Curtis H | 1 |
| #6 | Von Poederoyen Karl S | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4152095A | Fan operator lever vibration dampener | |
| US3932054A | Variable pitch axial fan | |
| US3392658A | Damper operating means | |
| US3371590A | Ventilator | |
| US3323438A | Explosion and fire release ventilator | |
| US3182581A | Explosion and fire release ventilator | |
| US2953079A | Rotary ventilator |