| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 7 | |
| #2 | United Kingdom | 5 | |
| #3 | Germany | 4 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Optics |
| # | Technology | |
|---|---|---|
| #1 | Measuring length, angles and areas | |
| #2 | Optical systems |
| # | Name | Total Patents |
|---|---|---|
| #1 | Johansson Carl Edvard | 7 |
| Publication | Filing date | Title |
|---|---|---|
| GB356026A | Improvement in gauge blocks and other precision measuring instruments | |
| GB200822A | Improvements in micrometer gauges for measuring internal and external dimensions | |
| GB216460A | Improvements in micrometer gauges | |
| GB196925A | Improvement in micrometer gauges | |
| GB154193A | Improvements in and relating to contour or profile gauges |