| # | Industry | |
|---|---|---|
| #1 | Consumer goods | |
| #2 | Audio-visual technology | |
| #3 | Telecommunications | |
| #4 | Measurement | |
| #5 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Goods for writing upon | |
| #2 | Special information storage | |
| #3 | Writing or drawing tools | |
| #4 | Telephonic communication | |
| #5 | Clutches and brakes | |
| #6 | Time-interval measuring |
| # | Name | Total Patents |
|---|---|---|
| #1 | Gockel Heinrich Dr | 4 |
| #2 | Heimberger Helmut | 3 |
| #3 | Gockel Dr Heinrich | 2 |
| #4 | Riefler Hans | 2 |
| #5 | Marcovic Dusan | 1 |
| #6 | Sajonz Dipl-Ing Paul | 1 |
| #7 | Riefler Dieter | 1 |
| #8 | Riefler Max | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE1903653A1 | Compasses with interchangeable work insert | |
| DE1279941B | Elliptical draftsman with movable cross guide | |
| DE1461640A1 | Writing instrument | |
| DE1461568A1 | Compass with a spindle that connects both legs to one another in an adjustable manner | |
| DE1411830A1 | Compasses with straight lines | |
| DE946311C | Drawing pen | |
| DE931131C | Zero circle | |
| DE917979C | Magnetic recorder | |
| DE906551C | Character head | |
| DE839178C | Barrel chronograph | |
| DE832867C | Character head | |
| DE829066C | Sound recording and reproducing device with more than one sound carrier |