| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 | |
| #2 | Canada | 5 | |
| #3 | Japan | 2 | |
| #4 | Argentina | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Environmental technology | |
| #3 | Engines, pumps and turbines | |
| #4 | Chemical engineering | |
| #5 | Thermal processes | |
| #6 | Transport | |
| #7 | Furniture and games |
| # | Technology | |
|---|---|---|
| #1 | Climate change adaptation technologies | |
| #2 | Supplying combustion engines | |
| #3 | Cyclones | |
| #4 | Separation | |
| #5 | Unspecified technologies | |
| #6 | Air-conditioning | |
| #7 | Unspecified technologies | |
| #8 | Vehicle air-treating devices | |
| #9 | Mixing | |
| #10 | Special furniture |
| # | Name | Total Patents |
|---|---|---|
| #1 | Petersen Ross K | 14 |
| #2 | Borsheim Lewis A | 1 |
| #3 | Borsheim L | 1 |
| #4 | Rosu Kee Peetaasen | 1 |
| #5 | Rosu Kei Piitaasen | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4201557A | Precleaner | |
| US4156449A | Shield apparatus | |
| US4137835A | Oscillatory food warming apparatus | |
| CA1072888A | Precleaner | |
| US4048911A | Air supply apparatus | |
| CA1046952A | Precleaner | |
| US3973937A | Engine air precleaner | |
| US4013137A | Engine air intake system | |
| US3965972A | Heating and cooling system | |
| US3928008A | Filtering apparatus | |
| US3740932A | Air pre cleaner | |
| US3670480A | Cleaner | |
| CA952828A | Centrifugal air pre-cleaner with high and low pressure chambers |