Average Co-Inventor Count = 6.00
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. Ngk Spark Plug Company, Limited (1 from 2,606 patents)
2. The Fujikura Cable Works Limited (1 from 32 patents)
3. Seidensha Electronics Co., Ltd. (1 from 12 patents)
1 patent:
1. 3969208 - Ultrasonic apparatus