| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 6 | |
| #2 | France | 3 | |
| #3 | Netherlands | 2 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Machines | |
| #3 | Optics |
| # | Technology | |
|---|---|---|
| #1 | Special information storage | |
| #2 | Television | |
| #3 | Unspecified technologies | |
| #4 | Electrography |
| # | Name | Total Patents |
|---|---|---|
| #1 | Gregg David P | 4 |
| #2 | Johnson Keith O | 3 |
| Publication | Filing date | Title |
|---|---|---|
| CA818664A | Video recording medium | |
| CA850843A | Electromagnetic record head and system | |
| CA881043A | Video signal transducer | |
| CA855301A | Video recording medium | |
| CA833100A | Optical transducer head and system | |
| CA855302A | Video recording medium |