| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 12 | |
| #2 | Germany | 3 | |
| #3 | France | 1 |
| # | Industry | |
|---|---|---|
| #1 | Optics | |
| #2 | Measurement | |
| #3 | Consumer goods | |
| #4 | Mechanical elements | |
| #5 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Measuring distances | |
| #2 | Optical systems | |
| #3 | Cameras | |
| #4 | Writing or drawing tools | |
| #5 | Frames | |
| #6 | Measuring length, angles and areas | |
| #7 | Railway brakes | |
| #8 | Processing photographic materials |
| # | Name | Total Patents |
|---|---|---|
| #1 | G Kern Cie A | 6 |
| #2 | Cie A-G Kern | 6 |
| Publication | Filing date | Title |
|---|---|---|
| FR845662A | Adjustable mechanical pencil for drawing instruments, in particular for compasses | |
| DE578361C | Viewfinder for cinematographic recording devices | |
| DE446436C | Rangefinder with double vision and ruler | |
| DE449148C | Reducing contact total station |