Average Co-Inventor Count = 4.80
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. Fuji Electrochemical Co., Ltd. (2 from 43 patents)
2 patents:
1. 4609956 - Magnetic drum cassette with magnetic drum having voice information
2. 4376961 - Magnetic drum/head system for selectively generating recorded voice