Average Co-Inventor Count = 3.43
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. Kowa Company Limited (2 from 591 patents)
2 patents:
1. 6822802 - Terrestrial telescope with digital camera
2. 5243368 - Ophthalmologic apparatus