| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 8 | |
| #2 | EPO (European Patent Office) | 4 | |
| #3 | WIPO (World Intellectual Property Organization) | 2 | |
| #4 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Optics |
| # | Technology | |
|---|---|---|
| #1 | Measuring length, angles and areas | |
| #2 | Optical systems | |
| #3 | Analysing materials |
| # | Name | Total Patents |
|---|---|---|
| #1 | Downs Michael John | 15 |
| #2 | Birch Keith Patrick | 2 |
| #3 | Bicrch Keith Patrick | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB0018304D0 | Jamin-type interferometers and components therefor | |
| GB9019648D0 | Optical measuring instruments | |
| GB8313556D0 | Measuring refractive index | |
| EP0094835A1 | Apparatus for investigation of a surface | |
| GB2109545A | Surface profile interferometer |