Average Co-Inventor Count = 4.00
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. Zenith Radio Corporation (2 from 476 patents)
2 patents:
1. D270157 - Telephone handset
2. D268758 - Combined telephone and clock radio