| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 5 | |
| #2 | France | 3 | |
| #3 | Germany | 2 | |
| #4 | United States | 2 |
| # | Industry | |
|---|---|---|
| #1 | Basic communication technologies | |
| #2 | Machines | |
| #3 | Electrical machinery and energy | |
| #4 | Semiconductors | |
| #5 | Audio-visual technology | |
| #6 | Computer technology | |
| #7 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Code conversion | |
| #2 | Semiconductor devices | |
| #3 | Unspecified technologies | |
| #4 | Electric switches | |
| #5 | Postal sorting | |
| #6 | Static stores | |
| #7 | Pistons and sealings | |
| #8 | Casings and printed circuits |
| # | Name | Total Patents |
|---|---|---|
| #1 | Parkinson Noel Percival | 9 |
| #2 | Percival Parkinson Noel | 2 |
| #3 | Gingell Bernard William | 1 |
| #4 | Parkinson Neol Percival | 1 |
| #5 | William Gingell Bernard | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB1177791A | Improvements in or relating to Optical Encoders | |
| GB1175351A | Improvements in or relating to Automatic Information Processing Apparatus. | |
| US3275961A | Wiper lift encoders | |
| GB1087271A | Method of producing an electrical component | |
| GB1108914A | Improvements in or relating to contact encoders | |
| GB1014503A | Mounting contacts |