| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | EPO (European Patent Office) | 3 | |
| #3 | China | 2 | |
| #4 | Finland | 2 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Machines | |
| #3 | Telecommunications | |
| #4 | Basic communication technologies | |
| #5 | Textiles and paper |
| # | Technology | |
|---|---|---|
| #1 | Electric switches | |
| #2 | Unspecified technologies | |
| #3 | Typewriters | |
| #4 | Telephonic communication | |
| #5 | Pulse technique |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kenmochi Yoshio | 9 |
| #2 | Yoshio Kenmochi | 2 |
| #3 | Yoshida Minoru | 1 |
| #4 | Kamata Yoshitaka | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US6677545B2 | Illumination key and method of manufacture | |
| CN1191379A | Illumination key and method of manufacture thereof | |
| US5661279A | Pushbutton switch | |
| FI924981A0 | Illuminated key |