| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 9 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Mechanical elements | |
| #3 | Machines | |
| #4 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Solid fuel combustion | |
| #2 | Pipes | |
| #3 | Fluid heaters | |
| #4 | Locks | |
| #5 | Nails | |
| #6 | Unspecified technologies | |
| #7 | Bolts for doors or windows | |
| #8 | Spraying devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hook Charles Howard | 11 |
| #2 | Burkart William Joseph | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1274715A | Conduit-support. | |
| US1151592A | Downdraft smoke-consuming boiler-furnace. | |
| US1089131A | Gas-boiler. | |
| US1077073A | Gas-burner. | |
| US1081306A | Heater. | |
| US964423A | Heater. | |
| CA118009A | Heating apparatus | |
| US919172A | Heater. | |
| US849132A | Adjustable pipe-hanger. | |
| US727950A | Sash-fastener. | |
| CA431742A | Clutch mechanism |