Average Co-Inventor Count = 2.18
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. Olympus Optical Company, Ltd. (4 from 5,729 patents)
4 patents:
1. 4459624 - Magnetic reproducing apparatus
2. 4366514 - Magnetic reproducing apparatus
3. 4258401 - Multi-channel record/playback magnetic head
4. 4248344 - Tape cassette