| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 12 | |
| #2 | United Kingdom | 3 | |
| #3 | United States | 3 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Engines, pumps and turbines | |
| #3 | Mechanical elements | |
| #4 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Refrigerators | |
| #2 | Pumps | |
| #3 | Ice-boxes | |
| #4 | Pistons and sealings | |
| #5 | Lubricating | |
| #6 | Venting or aerating devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hirche Willy | 6 |
| #2 | Willy Hirche | 3 |
| Publication | Filing date | Title |
|---|---|---|
| US2301656A | Compression refrigerating machine with oil collecting space in the crankcase | |
| GB506983A | Lubricating device for compression refrigerators | |
| GB486398A | Lubricating device for refrigerating machine compressors | |
| GB485457A | Compression refrigerating machine with lubricant circulation | |
| US2235213A | Compression refrigerating machine | |
| US2041128A | Refrigerant compressor |