Average Co-Inventor Count = 1.41
ph-index = 3
The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.
Company Filing History:
1. Dictaphone Corporation. (8 from 159 patents)
8 patents:
1. 4099209 - Electronic control system for multiple cassette record and/or playback
2. 4089489 - Braking apparatus for a web transport system
3. 4071857 - Cassette changer apparatus
4. 4061292 - Bi-directional rotary drive mechanism
5. 4056835 - Head support and eject mechanism for recording and/or playback apparatus
6. 4051540 - Instruction indicating apparatus for a record and/or playback device
7. 3986004 - Indexing apparatus for dictating and transcribing systems
8. 3934774 - Dual speed tape drive system for an endless loop dictating and