| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 5 | |
| #2 | United Kingdom | 5 | |
| #3 | France | 3 | |
| #4 | Canada | 2 | |
| #5 | United States | 2 | |
| #6 | Austria | 1 | |
| #7 | Belgium | 1 |
| # | Industry | |
|---|---|---|
| #1 | Textiles and paper | |
| #2 | Optics | |
| #3 | Machines | |
| #4 | Surface technology and coating | |
| #5 | Furniture and games |
| # | Technology | |
|---|---|---|
| #1 | Printing plates | |
| #2 | Photomechanical semiconductor production | |
| #3 | Reproduction of printing surfaces | |
| #4 | Shaping of plastics | |
| #5 | Fillers | |
| #6 | Sanitary equipment | |
| #7 | Layered products |
| # | Name | Total Patents |
|---|---|---|
| #1 | Tongs Derek John | 4 |
| #2 | John Tongs Derek | 3 |
| #3 | Shekter Robert John | 2 |
| #4 | Heussner Gerda | 2 |
| #5 | Gerda Heussner | 1 |
| #6 | Shekter Robert J | 1 |
| #7 | Charlton Henry Ernest | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB987218A | Improvements relating to the photomechanical production of printing plates | |
| GB976351A | Improvements in and relating to the manufacture of printing formes | |
| GB908600A | Improvements in and relating to printing plates | |
| GB898871A | Improvements in or relating to printing | |
| GB869851A | Improvements in and relating to the manufacture of cylindrical printing formes | |
| US2978324A | Half-tone printing blocks | |
| CA595526A | Half-tone printing blocks | |
| CA717484A | Printing plates |