Average Co-Inventor Count = 4.00
ph-index = 1
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. Matsushita Electric Industrial Co., Ltd. (1 from 27,375 patents)
1 patent:
1. 4338640 - Speed control system for a multiple speed tape recording and reproducing