Average Co-Inventor Count = 2.00
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. Hoya Corporation (1 from 2,532 patents)
2. Pentax Ricoh Imaging Company, Ltd. (1 from 123 patents)
2 patents:
1. 8232493 - Operating device
2. 8023240 - Operating device