Average Co-Inventor Count = 1.20
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. Minnesota Mining and Manufacturing Company (3 from 7,865 patents)
3 patents:
1. 5535190 - Driver system for an updatable optical storage-media
2. 5364671 - Cover assembly for use with photographs
3. 5032436 - Frame for use with photographs