| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 6 | |
| #2 | France | 6 | |
| #3 | United Kingdom | 5 | |
| #4 | Germany | 4 | |
| #5 | Canada | 2 | |
| #6 | Sweden | 2 | |
| #7 | United States | 2 | |
| #8 | Italy | 1 |
| # | Industry | |
|---|---|---|
| #1 | Computer technology | |
| #2 | Optics |
| # | Technology | |
|---|---|---|
| #1 | Data recognition and presentation | |
| #2 | Optical systems |
| # | Name | Total Patents |
|---|---|---|
| #1 | Klemt A | 5 |
| #2 | Klemt Arthur | 5 |
| #3 | Klemt Kg Arthur | 3 |
| #4 | Arthur Klemt | 3 |
| Publication | Filing date | Title |
|---|---|---|
| GB1371250A | Character-scanning device | |
| GB1371267A | Method of and apparatus for matrix-scanning of characters | |
| CA941969A | Character recognition contrast level control | |
| US3752561A | Torsioned light conducting means for the illumination of an image field with modulated light | |
| GB1360828A | Optical apparatus | |
| GB1326141A | Raster process for classifying characters |