| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 11 | |
| #2 | United States | 11 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Mechanical elements | |
| #3 | Measurement |
| # | Name | Total Patents |
|---|---|---|
| #1 | Smith Ronald V | 8 |
| #2 | Smith Norman J | 7 |
| #3 | Bergquist Theodore W | 4 |
| #4 | Kaiser Edward J | 1 |
| #5 | Myers Charles J | 1 |
| #6 | Burke John E | 1 |
| #7 | Hudson Milton A | 1 |
| #8 | Burkhardt Henry J | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3196688A | Bleeder means for gauges | |
| US3086494A | Precision dial assembly for gauges | |
| US3141335A | Pressure relief means for gauges | |
| US3027916A | Safety relief valve | |
| US3042068A | Safety relief valve | |
| US2815040A | Pressure relief valve | |
| US2792015A | Liquid relief valve | |
| US2597057A | Safety valve | |
| US2414794A | Safety valve | |
| US1641838A | Pressure gauge | |
| US944330A | Steam safety-valve. | |
| CA475169A | Safety valves | |
| CA689864A | Precision dial assembly for gauges | |
| CA710547A | Pressure indicator gauge | |
| CA507209A | Safety valves | |
| CA583406A | Liquid relief valve | |
| CA577161A | Pressure relief valve | |
| CA722908A | Bleeder means for gauges | |
| CA886304A | Adjustable stop for a turret slide head | |
| CA647730A | Safety relief valve |