| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 7 | |
| #2 | United States | 5 | |
| #3 | Switzerland | 3 | |
| #4 | Japan | 3 | |
| #5 | United Kingdom | 2 | |
| #6 | Italy | 2 | |
| #7 | Belgium | 1 | |
| #8 | Canada | 1 | |
| #9 | Mexico | 1 | |
| #10 | Netherlands | 1 | |
| #11 | Portugal | 1 |
| # | Industry | |
|---|---|---|
| #1 | Control | |
| #2 | Consumer goods | |
| #3 | Computer technology | |
| #4 | Optics | |
| #5 | Audio-visual technology |
| # | Technology | |
|---|---|---|
| #1 | Teaching materials | |
| #2 | Goods for writing upon | |
| #3 | Analogue computers | |
| #4 | Cameras | |
| #5 | Advertising |
| # | Name | Total Patents |
|---|---|---|
| #1 | Riehle Harald | 11 |
| #2 | Hararuto Riere | 3 |
| Publication | Filing date | Title |
|---|---|---|
| JPS58107990A | Slide rule | |
| GB2108711A | Apparatus for the proportional transfer of a variable sector of one image to an image of smaller format | |
| US4245401A | Planning device | |
| JPS52154432A | Assisting device for designing | |
| FR2349460A1 | Planning board with surface of soft adhesive foil | |
| US4148148A | Planning board | |
| US3916162A | Slide rule |