| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 3 | |
| #2 | Denmark | 2 | |
| #3 | Ireland | 2 | |
| #4 | Australia | 1 | |
| #5 | Brazil | 1 | |
| #6 | Canada | 1 | |
| #7 | Switzerland | 1 | |
| #8 | EPO (European Patent Office) | 1 | |
| #9 | United Kingdom | 1 | |
| #10 | Greece | 1 | |
| #11 | Hong Kong | 1 | |
| #12 | India | 1 | |
| #13 | Sweden | 1 | |
| #14 | Singapore | 1 | |
| #15 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Computer technology | |
| #2 | Furniture and games | |
| #3 | Textiles and paper |
| # | Technology | |
|---|---|---|
| #1 | Electric digital data processing | |
| #2 | Games | |
| #3 | Typewriters |
| # | Name | Total Patents |
|---|---|---|
| #1 | Endfield Cyril | 12 |
| #2 | Southgate John | 6 |
| #3 | Rainey Christopher John | 6 |
| #4 | Rainey Christopher J | 2 |
| #5 | John Southgate | 1 |
| #6 | Cyril Endfield | 1 |
| #7 | South Gate John | 1 |
| #8 | John Rainey Christopher | 1 |
| #9 | Endfield C | 1 |
| #10 | Endfield Curil | 1 |
| Publication | Filing date | Title |
|---|---|---|
| IE840355L | Computer apparatus | |
| GB8305011D0 | Computer apparatus and remote keyboards | |
| US4442506A | Portable word-processor | |
| US4443789A | Keyboard | |
| US4360892A | Portable word-processor | |
| DK75479A | Word processing unit | |
| IE790530L | A portable keyboard device |