Average Co-Inventor Count = 5.54
ph-index = 4
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 164,197 patents)
2. Discovision Associates (2 from 329 patents)
4 patents:
1. D267151 - Typewriter
2. D258957 - Keyboard housing
3. D258733 - Portable dictation machine or the like
4. D257533 - Video disk player