| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 2 | |
| #2 | Belgium | 1 | |
| #3 | Canada | 1 | |
| #4 | Germany | 1 | |
| #5 | Denmark | 1 | |
| #6 | Spain | 1 | |
| #7 | United Kingdom | 1 | |
| #8 | Ireland | 1 | |
| #9 | Italy | 1 | |
| #10 | Netherlands | 1 | |
| #11 | Sweden | 1 | |
| #12 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Computer technology | |
| #3 | Control |
| # | Technology | |
|---|---|---|
| #1 | Casings and printed circuits | |
| #2 | Teaching materials | |
| #3 | Analogue computers |
| # | Name | Total Patents |
|---|---|---|
| #1 | Grelle Guy Oscar Charles Le | 1 |
| #2 | Legrelle G O C | 1 |
| #3 | Grelle G O Ch Le | 1 |
| #4 | Le Grelle Guy Oscar | 1 |
| #5 | Le Grelle Guy O C | 1 |
| #6 | Grelle G O C L | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB1568852A | Electronic experimenting kit | |
| FR2268435A1 | Electrical circuit connection unit - consists of conical screwed wire socket fitting hole in insulating plate with surface conductors |