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. Nippon Kogaku K.k. (2 from 849 patents)
2 patents:
1. 4575771 - Apparatus for superimposing and reproducing still picture signals
2. 4532558 - Picture recording apparatus