Average Co-Inventor Count = 2.25
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. Minnesota Mining and Manufacturing Company (3 from 7,865 patents)
3 patents:
1. 5028518 - Radiographic thermographic imaging film
2. 4707435 - Industrial X-ray system
3. 4480024 - Industrial X-ray photothermographic system