Average Co-Inventor Count = 3.20
ph-index = 3
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. Carl Zeiss Surgical Gmbh (3 from 50 patents)
2. The Procter Gamble Company (1 from 17,173 patents)
4 patents:
1. 7467868 - Head magnifier
2. D574078 - Feminine hygiene article
3. D564011 - Magnifier spectacles
4. D562876 - Binocular magnifier