Average Co-Inventor Count = 1.33
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. J. B. Engineering Co., Inc. (2 from 2 patents)
2. Other (1 from 832,891 patents)
3 patents:
1. 5346298 - Cartridge retaining means
2. 5193891 - Cartridge retaining means
3. 4437738 - Optical rollfiche reader