| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 9 | |
| #2 | Belgium | 2 | |
| #3 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Control | |
| #3 | Optics | |
| #4 | Chemical engineering | |
| #5 | Agriculture | |
| #6 | Packaging and shipping |
| Publication | Filing date | Title |
|---|---|---|
| GB894268A | Improvements in or relating to apparatus for controlling the delivery of a fluid under pressure from two or more sources |