Average Co-Inventor Count = 1.33
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. Yoshida Kogyo K.k. (2 from 1,145 patents)
2 patents:
1. 5031815 - Button feeder for button applicator
2. 4051710 - Pull tab attachment tool