Average Co-Inventor Count = 4.44
ph-index = 2
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. Other (1 from 832,680 patents)
2. Dictaphone Corporation. (1 from 159 patents)
2 patents:
1. 5179627 - Digital dictation system
2. 5163085 - Digital dictation system with voice mail capability