| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Norway | 13 | |
| #2 | Switzerland | 10 | |
| #3 | Sweden | 10 | |
| #4 | Canada | 8 | |
| #5 | Germany | 6 | |
| #6 | United Kingdom | 6 | |
| #7 | Australia | 5 | |
| #8 | Brazil | 5 | |
| #9 | France | 5 | |
| #10 | Italy | 5 | |
| #11 | Japan | 5 | |
| #12 | Spain | 4 | |
| #13 | Israel | 4 | |
| #14 | United States | 4 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Basic communication technologies | |
| #3 | Control | |
| #4 | Telecommunications | |
| #5 | Machine tools | |
| #6 | Optics | |
| #7 | Electrical machinery and energy |
| # | Name | Total Patents |
|---|---|---|
| #1 | Farrand Clair L | 14 |
| #2 | Tripp Robert W | 8 |
| #3 | Grace William H | 8 |
| #4 | Elbling Joseph | 8 |
| #5 | Clifford William H | 6 |
| #6 | Tripp R W | 5 |
| #7 | Foster Vincent F | 4 |
| #8 | Farrand Robert W | 4 |
| #9 | Murray Edward W | 4 |
| #10 | Farrand C | 4 |
| Publication | Filing date | Title |
|---|---|---|
| US4463333A | Transformer-type position transducer | |
| DE3037567A1 | METHOD AND DEVICE FOR CALIBRATING AN OPTICAL MEASURING SYSTEM | |
| US4227165A | Correction of linear errors in position measuring transducers | |
| US4215938A | Method and apparatus for correcting the error of a position measuring interferometer |