Average Co-Inventor Count = 1.97
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. International Business Machines Corporation (4 from 164,173 patents)
4 patents:
1. 4458345 - Process for optical information storage
2. 4431259 - Holographic recording media for infrared light
3. 4339513 - Process and recording media for continuous wave four-level, two-photon
4. 4158890 - Frequency selective optical data storage system