Average Co-Inventor Count = 2.00
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. Phonetics, Inc. (2 from 5 patents)
2. Wisconsin Bell, Inc. (1 from 1 patent)
2 patents:
1. 4716582 - Digital and synthesized speech alarm system
2. 4558181 - Portable device for monitoring local area