| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 4 | |
| #2 | United States | 4 | |
| #3 | Canada | 3 | |
| #4 | Germany | 3 | |
| #5 | France | 3 | |
| #6 | Brazil | 2 | |
| #7 | Ireland | 2 | |
| #8 | Japan | 2 |
| # | Industry | |
|---|---|---|
| #1 | Telecommunications |
| # | Technology | |
|---|---|---|
| #1 | Telephonic communication | |
| #2 | Selecting |
| # | Name | Total Patents |
|---|---|---|
| #1 | Bloch Alan | 6 |
| #2 | Joslow David L | 5 |
| #3 | Straube Harold M | 5 |
| #4 | Henthorn Lincoln | 4 |
| #5 | Falconer Charles B | 4 |
| #6 | Hurle Robert J | 3 |
| #7 | Joslow D | 1 |
| #8 | Aran Burotsufu | 1 |
| #9 | Rinkaan Hensoon | 1 |
| #10 | Hurle R | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4086440A | Telephone set with loop current interruption timing control | |
| GB1538996A | Communication switching system | |
| US4016370A | Digital tone decoder | |
| CA1024279A | Electronic time-division-multiplexed pabx telephone system |