| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 6 | |
| #2 | Germany | 3 | |
| #3 | France | 1 | |
| #4 | Netherlands | 1 | |
| #5 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Control | |
| #3 | Measurement | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Systems controlling non-electric variables | |
| #3 | Measuring volume | |
| #4 | Venting or aerating devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | T Cameron Albert | 1 |
| #2 | Douglas Robert R | 1 |
| #3 | R Douglas Robert | 1 |
| #4 | N Johnson Dwight | 1 |
| #5 | Johnson Dwight N | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3542067A | Control valve | |
| FR1487776A | Gas meter | |
| GB1083685A | Liquid meter |