| |||
| Schreibfederschreiber | |||
| Federschreiber m | |||
| Linienschreiber m | |||
| Meßschreiber m; Registriergerät n | |||
| Tintenschreiber m; Fallbuegelschreiber m | |||
|
pen-recorder : 15 phrases in 5 subjects |
| Communications | 1 |
| Measuring instruments | 3 |
| Optics branch of physics | 7 |
| Sound recording | 2 |
| Technology | 2 |