| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Canada | 8 | |
| #3 | Germany | 1 | |
| #4 | France | 1 | |
| #5 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Thermal processes | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Venting or aerating devices | |
| #2 | Steam generation | |
| #3 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Wilson Wylie G | 10 |
| #2 | Wilson Wylie Gemmel | 5 |
| #3 | Gemmel Wilson Wylie | 3 |
| Publication | Filing date | Title |
|---|---|---|
| US1633690A | Nonrevoluble valve | |
| US1627299A | Lifting valve | |
| US1611844A | Gate valve | |
| GB258663A | Improvement in boiler blow-off systems | |
| US1622016A | Apparatus for controlling the flow of fluid to a valve | |
| US1586347A | Valve | |
| US1586346A | Valve | |
| US1540380A | Valve | |
| US1485002A | Method of operating mechanism by gravity | |
| US1586345A | Loose-seat gate valve | |
| US1547708A | Method of blowing off boilers | |
| CA241275A | Method of operating mechanism by gravity | |
| CA279458A | Gate vave | |
| CA258207A | Boiler blow-off system | |
| CA263021A | Gate valve | |
| CA271601A | Packing ring for valves | |
| CA296456A | Gate valve | |
| CA260705A | Valve | |
| CA255549A | Valve |