Average Co-Inventor Count = 1.50
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. Daiwa Seiko, Inc. (2 from 602 patents)
2 patents:
1. 4682439 - Fishingline guide for fishing rod
2. 4653216 - Tube for fishing rod