Average Co-Inventor Count = 5.00
ph-index = 1
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. Hewlett-packard Company (1 from 9,638 patents)
2. Mitsumi Electric Company Ltd. (1 from 1,572 patents)
1 patent:
1. 5758835 - Magnetic tape apparatus for controlling a back tension of a magnetic