| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Germany | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Packaging and shipping | |
| #3 | Measurement | |
| #4 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Postal sorting | |
| #2 | Handling thin material | |
| #3 | Unspecified technologies | |
| #4 | Representation of music | |
| #5 | Measuring mechanical vibrations |
| # | Name | Total Patents |
|---|---|---|
| #1 | Zimmermann Armin | 11 |
| Publication | Filing date | Title |
|---|---|---|
| DE3012727A1 | Voice quality testing appts. - has respective sets of musical note and octave selector buttons for measuring amplitude at selected frequency |