| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 4 | |
| #2 | Hong Kong | 2 | |
| #3 | Canada | 1 | |
| #4 | EPO (European Patent Office) | 1 | |
| #5 | Japan | 1 | |
| #6 | Norway | 1 | |
| #7 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Machines | |
| #3 | Mechanical elements | |
| #4 | Measurement | |
| #5 | Thermal processes |
| # | Name | Total Patents |
|---|---|---|
| #1 | West Harold H | 3 |
| #2 | Shaw Jonathan Graham | 2 |
| #3 | Matthews P J | 1 |
| #4 | Seymour David Jackson | 1 |
| #5 | Clark Thomas Andrew | 1 |
| #6 | Macritchie Norman | 1 |
| #7 | Seymour D J | 1 |
| #8 | Matthews Parker James | 1 |
| #9 | Clark T A | 1 |
| #10 | Dall Stephan | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US6035700A | Method of leak testing an assembled plate type heat exchanger | |
| US6009745A | Method of leak testing an assembled plate type heat exchanger | |
| HK65578A | Improvements in or relating to antipollution valves | |
| US4157072A | Combination pressure-vacuum relief and antipollution valve | |
| US4143672A | Anti-pollution valve for use with shipboard storage tanks |