| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 9 | |
| #2 | Canada | 3 | |
| #3 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Mechanical elements | |
| #4 | Thermal processes |
| # | Technology | |
|---|---|---|
| #1 | Indexing scheme relating to hinges | |
| #2 | Unspecified technologies | |
| #3 | Hinges for doors or windows | |
| #4 | Venting or aerating devices | |
| #5 | Servomotors | |
| #6 | Refrigerators | |
| #7 | Doors and windows | |
| #8 | Steam generation |
| # | Name | Total Patents |
|---|---|---|
| #1 | Erwood John | 13 |
| #2 | Walch Robert Hilton | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US901084A | Relief-valve. | |
| US893911A | Reversible cut-out valve for steam boilers and pipes. | |
| US893910A | Steam-boiler. | |
| US873359A | Rolling door. | |
| US859441A | Valve. | |
| CA94797A | Warehouse door | |
| CA94755A | Warehouse door | |
| GB190509962A | Improvements in Lifting and Horizontally Folding Warehouse Doors for Counterbalancing and Automatic Closing. | |
| CA90140A | Warehouse door | |
| US788761A | Warehouse-door. | |
| US766762A | Warehouse-door. | |
| US766761A | Warehouse-door. | |
| US756609A | Warehouse-door. |