Frank Ferguson
3Patents
0Active
3Granted
24Portfolio score
Filing activity: Feb 26, 1982 → Jul 28, 1986
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4684349A | Audio-visual teaching system and method | Physics | 161 | Expired |
| US4482328A | Audio-visual teaching machine and control system therefor | Physics | 11 | Expired |
| US4552535A | Mechanical assembly for audio-visual teaching machines | Physics | 4 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.