Average Co-Inventor Count = 1.80
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. Hitachi Maxell, Limited (2 from 1,112 patents)
2. Hitachi Maxwell, Ltd. (1 from 56 patents)
3 patents:
1. D369794 - Cassette tape
2. 5253822 - Tape cartridge having a name plate with an index formed thereon
3. D328971 - Case for a cassette tape