| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Japan | 8 | |
| #2 | Canada | 3 | |
| #3 | United States | 2 | |
| #4 | Germany | 1 | |
| #5 | France | 1 | |
| #6 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Telecommunications | |
| #2 | Basic communication technologies | |
| #3 | Semiconductors |
| # | Technology | |
|---|---|---|
| #1 | Telephonic communication | |
| #2 | Selecting | |
| #3 | Transmission | |
| #4 | Generation of oscillations | |
| #5 | Resonators | |
| #6 | Semiconductor devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Cowpland Michael C J | 5 |
| #2 | Patoritsuku Aaru Baan | 5 |
| #3 | Maikuru Shii Jiei Kaupurando | 4 |
| #4 | Jiyoon Ei Kuraibu | 2 |
| #5 | Resutaa Enu Kaakurando | 1 |
| #6 | Jieemusu Jiei Kiyubineku | 1 |
| #7 | Uiriamu Bii Kisu | 1 |
| #8 | Robaato Ei Deyuransu | 1 |
| #9 | Cowpland Michael Christopher J | 1 |
| #10 | Matthews Terrence H | 1 |
| Publication | Filing date | Title |
|---|---|---|
| JPS54104712A | Telephone line circuit | |
| CA988175A | Tone generator | |
| CA1032221A | Telephone line impedance regulator | |
| CA998484A | Audio frequency signalling systems for telephone systems |