| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 4 | |
| #2 | United States | 4 | |
| #3 | EPO (European Patent Office) | 3 | |
| #4 | Japan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Environmental technology | |
| #2 | Thermal processes | |
| #3 | Chemical engineering | |
| #4 | Basic materials chemistry | |
| #5 | Machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Pravda Milton F | 12 |
| Publication | Filing date | Title |
|---|---|---|
| US5945031A | Freeze resistant, Perkins tube type heat exchanger | |
| US5846299A | Recovering water soluble, volatile, organic compounds from bakery and other plant emissions | |
| US5303565A | Rotary absorption heat pump of improved performance | |
| US5123479A | Rotary heat exchanger of improved effectiveness | |
| CA1270244A | Self-cleaning rotary heat exchanger |