| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | Denmark | 3 | |
| #3 | Netherlands | 2 | |
| #4 | Germany | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Audio-visual technology |
| # | Technology | |
|---|---|---|
| #1 | Loudspeakers and microphones | |
| #2 | Measuring mechanical vibrations | |
| #3 | Measuring electric variables |
| # | Name | Total Patents |
|---|---|---|
| #1 | Frye George Joseph | 7 |
| #2 | Frye G J | 2 |
| #3 | Geerling Leonardus Johannes | 2 |
| Publication | Filing date | Title |
|---|---|---|
| DK299877A | Automatic acoustic testing system | |
| US4065647A | Automatic acoustical testing system | |
| US4078233A | Analog to digital converter circuit with gain ranging feedback | |
| US3979567A | Microphone coupler for hearing aid having inverted conical end configuration | |
| US3923119A | Sound pressure box | |
| US3922506A | Acoustical testing system |