| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 4 | |
| #2 | Austria | 2 | |
| #3 | Germany | 2 | |
| #4 | Denmark | 2 | |
| #5 | France | 2 | |
| #6 | United Kingdom | 2 | |
| #7 | Japan | 1 | |
| #8 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Medical technology | |
| #3 | Basic communication technologies |
| # | Technology | |
|---|---|---|
| #1 | Loudspeakers and microphones | |
| #2 | Implantable devices | |
| #3 | Casings and printed circuits | |
| #4 | Amplification control |
| # | Name | Total Patents |
|---|---|---|
| #1 | Schiess Hans-Rudolf | 6 |
| #2 | Hiller Erhard | 2 |
| #3 | Scherer Benjamin | 1 |
| #4 | Winiger Hubert | 1 |
| #5 | Meyer Serge Eduard Hector | 1 |
| #6 | Eraharuto Hiraa | 1 |
| #7 | Hiller E | 1 |
| Publication | Filing date | Title |
|---|---|---|
| FR2532838A1 | EARPHONE TYPE ACOUSTIC PROTECTION APPARATUS | |
| CH657733A5 | Hearing-aid | |
| CH643977A5 | Adjustment unit which is constructed of discrete electrical circuit elements, and can be switched in steps | |
| CH648172A5 | Hearing-aid to be worn in the ear | |
| US4152551A | Pocket hearing aid with slideable mechanism for battery replacement and access openings | |
| CH599740A5 | Hearing aid built into spectacle frame |