| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 14 | |
| #2 | Canada | 3 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Mechanical elements | |
| #3 | Machine tools | |
| #4 | Machines | |
| #5 | Chemical engineering |
| # | Technology | |
|---|---|---|
| #1 | Fluid heaters | |
| #2 | Unspecified technologies | |
| #3 | Venting or aerating devices | |
| #4 | Domestic heating systems | |
| #5 | Tools for connecting or disengaging | |
| #6 | Casings for combustion chambers | |
| #7 | Cleaning | |
| #8 | Accessories for machine tools | |
| #9 | Thread cutting | |
| #10 | Pipes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Stack Elmer S | 17 |
| Publication | Filing date | Title |
|---|---|---|
| US2352919A | Progressive water heating system | |
| US2159571A | Water heater | |
| US2032447A | Water heating and storage system with dual thermostatic control | |
| US1774041A | Compound water heater | |
| US1681377A | Storage water heater | |
| US1249233A | Combined faucet and relief-valve. | |
| US1237403A | Automatic instantaneous water heating and storage system. | |
| US1109946A | Water connection. | |
| US1234949A | Remote control means for water-heaters. | |
| US1046120A | Pipe-vise. | |
| US1038014A | Ball-cock. | |
| US1147456A | Pipe-threader. | |
| CA126080A | Valve | |
| US935281A | Ball-cock. | |
| CA98059A | Water heater | |
| US780736A | Water-heater. | |
| CA405103A | Water heater |