| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 4 | |
| #2 | United Kingdom | 4 | |
| #3 | United States | 3 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Measuring force, work and fluid pressure | |
| #2 | Servomotors | |
| #3 | Nails | |
| #4 | Measuring temperature | |
| #5 | Special measuring |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ross Birch George Christian | 3 |
| Publication | Filing date | Title |
|---|---|---|
| US2427249A | Fluid pressure gauge | |
| GB579612A | Improvements in or relating to fluid pressure gauges | |
| US2356442A | Pressure gauge | |
| GB558817A | Improvements in or relating to pressure gauges | |
| US2358047A | Hydraulic remote indicating apparatus | |
| GB554722A | Improvements in or relating to differential pressure gauges | |
| GB550694A | Improvements in or relating to hydraulic remote indicating apparatus |