| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 15 | |
| #2 | Switzerland | 1 |
| # | Industry | |
|---|---|---|
| #1 | Computer technology |
| # | Technology | |
|---|---|---|
| #1 | Mechanically computing digital computers |
| # | Name | Total Patents |
|---|---|---|
| #1 | Co Hannovera Rechenmaschinenfa | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE428501C | Ten switching device for calculating machine counters | |
| DE409433C | Device on calculating machines to prevent incorrect calculation results | |
| DE385978C | Calculating machine with a counter, the number of which can be interrupted at one point | |
| DE395176C | Adding machine | |
| DE416567C | Ten switching device for calculating machines | |
| DE413824C | Revolution counter for calculating machines | |
| DE405412C | Adding machine |