Average Co-Inventor Count = 1.00
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. Pentax Corporation (4 from 1,056 patents)
2. Hoya Corporation (2 from 2,530 patents)
6 patents:
1. 7941889 - Cleaning tool for photographic device
2. D593267 - Cleaner
3. 7490380 - Cleaning tool for photographic device
4. D561960 - Cleaner
5. D560318 - Cleaner
6. D560320 - Cleaner