| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 17 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Machines | |
| #3 | Chemical engineering | |
| #4 | Audio-visual technology | |
| #5 | Packaging and shipping | |
| #6 | Consumer goods | |
| #7 | Civil engineering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Leach Charles H | 19 |
| Publication | Filing date | Title |
|---|---|---|
| US2184308A | Heat exchange apparatus | |
| US2122256A | Heat exchange apparatus | |
| US1980627A | Heat exchange apparatus | |
| US1980626A | Heat exchange apparatus | |
| US1979751A | Heat exchange apparatus | |
| US1987116A | Heat exchange apparatus | |
| US2059967A | Heat exchange apparatus | |
| US2061429A | Heat exchange apparatus | |
| US2057437A | Bubble tower apparatus | |
| US2032021A | Heat exchange apparatus | |
| US1997194A | Heat exchange apparatus | |
| US2004469A | Heat exchange apparatus | |
| US1821347A | Oil refining apparatus | |
| US1821346A | Refining apparatus | |
| US1604179A | Refining apparatus | |
| US1053409A | Blue-print washing and developing receptacle. | |
| US732305A | Cuff-holder. | |
| CA280111A | Oil refining apparatus | |
| CA305350A | Heat exchange apparatus |