| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 3 | |
| #2 | Canada | 2 | |
| #3 | France | 2 | |
| #4 | Israel | 2 | |
| #5 | Netherlands | 2 | |
| #6 | Sweden | 2 | |
| #7 | Germany | 1 | |
| #8 | United Kingdom | 1 | |
| #9 | Italy | 1 | |
| #10 | Japan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Analysing materials | |
| #2 | Geophysics |
| # | Name | Total Patents |
|---|---|---|
| #1 | Showalter Lane Crawford | 2 |
| #2 | Watts Geoffrey B | 2 |
| #3 | Brokenshire John Leslie | 2 |
| #4 | Brokenshire J L | 2 |
| #5 | Showalter L C | 2 |
| #6 | Watts G B | 2 |
| #7 | Konstanty Hass Zygmunt | 1 |
| #8 | Jiyon Eru Burotsukenshiyaiyaa | 1 |
| #9 | Ren Shii Shiyowarutaa | 1 |
| #10 | Showalter Lane C | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4045997A | Air curtain device | |
| IL49071D0 | Method and apparatus for detecting vapours in air | |
| CA997169A | Detector for a trace of a specific vapour in the atmosphere | |
| US3093783A | Electronic circuits for comparing an a. c. voltage to a d. c. voltage | |
| CA711807A | Electronic circuits |