| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 7 | |
| #2 | United Kingdom | 2 | |
| #3 | Italy | 2 | |
| #4 | Japan | 2 | |
| #5 | Canada | 1 | |
| #6 | Germany | 1 | |
| #7 | Denmark | 1 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Medical technology | |
| #3 | Basic communication technologies | |
| #4 | Electrical machinery and energy | |
| #5 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Loudspeakers and microphones | |
| #2 | Diagnosis and surgery | |
| #3 | Amplification control | |
| #4 | Electric switches | |
| #5 | Measuring mechanical vibrations |
| # | Name | Total Patents |
|---|---|---|
| #1 | Von Recklinghausen Daniel R | 7 |
| #2 | Recklinghausen Daniel Von | 2 |
| #3 | Klar Irwin | 2 |
| #4 | Keller J E | 1 |
| #5 | Marchese Justin W | 1 |
| #6 | Keller James E | 1 |
| #7 | Jieemusu Ii Keraa | 1 |
| #8 | Danieru Aaru Bon Rekuringuhaus | 1 |
| #9 | Klar I | 1 |
| #10 | Aauin Kuraa | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4429702A | Apparatus for measurement of acoustic volume | |
| US4406921A | Apparatus for improving linearity of electromechanical transducers | |
| US4383134A | Loudspeaker systems | |
| US4237905A | Automatic tympanometric testing means | |
| US4246453A | Switch | |
| US4327250A | Dynamic speaker equalizer | |
| US4037061A | Planar pattern voice coil audio transducer |