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. Kojima Co., Ltd. (2 from 4 patents)
2. Sharp Kabushiki Kaisha Corporation (1 from 25,537 patents)
2 patents:
1. 8036906 - Method and system for merchandise retail management and portable terminal
2. 7673328 - Network authentication system using individual services providers and an authentication server