| # | Country | Total Patents | |
|---|---|---|---|
| #1 | EPO (European Patent Office) | 5 | |
| #2 | Switzerland | 4 | |
| #3 | Finland | 2 | |
| #4 | Norway | 2 | |
| #5 | Australia | 1 | |
| #6 | Brazil | 1 | |
| #7 | Canada | 1 | |
| #8 | Germany | 1 | |
| #9 | Denmark | 1 | |
| #10 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Basic communication technologies | |
| #2 | Electrical machinery and energy | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Pulse technique | |
| #2 | Electric switches | |
| #3 | Mechanical control devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Iten Thomas | 16 |
| #2 | Buehlmann Albert | 4 |
| #3 | Schenk Marc | 2 |
| #4 | Dogwiler Joerg | 2 |
| #5 | Schenk Max | 2 |
| Publication | Filing date | Title |
|---|---|---|
| EP0933873A1 | Piezoelectric keyboard | |
| EP0502452A1 | Self-illuminating piezo-electric keyboard | |
| EP0472888A1 | Flat keyboard | |
| DE4035261A1 | Circuitry processing signals form piezoelectric key - has circuit between piezo-element terminals with resistor(s) and series-connected electronic switch | |
| EP0366832A1 | Cover for contact foil keyboards | |
| CH675028A5 | Front protective cover plate for foil keyboard - has reduced thickness zone above each piezoelectric keyboard element providing zone of high elasticity in cover plate |