| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 13 |
| # | Industry | |
|---|---|---|
| #1 | Computer technology | |
| #2 | Digital networks | |
| #3 | Textiles and paper |
| # | Technology | |
|---|---|---|
| #1 | Data recognition and presentation | |
| #2 | Copy machines | |
| #3 | Digital information transmission |
| # | Name | Total Patents |
|---|---|---|
| #1 | Michael Maul | 13 |
| #2 | Karl Hummel | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2240566A | Card punching machine | |
| US2265442A | Sorting machine | |
| US2282072A | Machine for operating upon record cards | |
| US2265441A | Record controlled sorting machine | |
| US2209414A | Sorting machine | |
| US2265440A | Card sorting machine | |
| US2244257A | Translating means for electrical currents | |
| US2254901A | Sorting machine | |
| US2210552A | Card punching machine | |
| US2265439A | Sorting machine for perforated records | |
| US2189042A | Sheet severing mechanism | |
| US2146307A | Addressing machine with counter |