Average Co-Inventor Count = 4.80
ph-index = 2
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. International Business Machines Corporation (2 from 164,244 patents)
2 patents:
1. 4531689 - Vacuum probe for attaching tape to reel hub within a cartridge
2. 4519553 - Multiple spindle winding apparatus