| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 6 | |
| #2 | Germany | 5 | |
| #3 | France | 5 | |
| #4 | Belgium | 3 | |
| #5 | United Kingdom | 2 | |
| #6 | Austria | 1 | |
| #7 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Packaging and shipping | |
| #3 | Textiles and paper | |
| #4 | Electrical machinery and energy | |
| #5 | Control | |
| #6 | Thermal processes | |
| #7 | Furniture and games |
| # | Name | Total Patents |
|---|---|---|
| #1 | Doyen Leon | 9 |
| #2 | Doyen Louis | 9 |
| #3 | Louis Doyen | 6 |
| #4 | Leon Doyen | 6 |
| Publication | Filing date | Title |
|---|---|---|
| BE900369A | Electric plug removing mechanism - includes lever or threaded ring to eject plug from socket | |
| BE898628A | Push-button for domestic plug - offers easy ejection from socket without pulling on plug or lead | |
| US3935993A | Free-standing container | |
| FR2109357A5 | Sheet moulding process - using simultaneous partial surface and core melting for heavy propile moulding | |
| GB1202419A | Machine for packing liquid products | |
| GB1158228A | Improvement in Welding Machines for Thermoplastic Materials. |