| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 50 | |
| #2 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Machines | |
| #3 | Thermal processes | |
| #4 | Basic communication technologies | |
| #5 | Control |
| # | Name | Total Patents |
|---|---|---|
| #1 | Mccollum Henry J De N | 51 |
| #2 | Spackman Thomas F | 1 |
| #3 | Mccollum James H K | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2366416A | Heater | |
| US2362283A | Heating and electrical generating apparatus | |
| US2362571A | Heater | |
| US2346499A | Television apparatus | |
| US2337484A | Automatically controlled heater | |
| US2327202A | Aircraft heating apparatus | |
| US2364458A | Heating system | |
| US2364457A | Heating system | |
| US2281107A | Heating system | |
| US2330298A | Heating system | |
| US2302456A | Room heater | |
| US2315636A | Automobile heater | |
| US2332094A | Automobile heater | |
| US2325189A | Valve for automobile heaters | |
| US2263999A | Automobile heater | |
| US2285672A | Aircraft heater | |
| US2191178A | Automobile heater | |
| US2263998A | Heating apparatus | |
| US2308888A | Heater | |
| US2263997A | Automobile heater |