Average Co-Inventor Count = 1.25
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. Imazaike Seiko Kabushiki Kaisha (3 from 3 patents)
2. Matsushita Denkisangyo Kabushiki Kaisha (2 from 3 patents)
3. Matsushita Electric Works, Ltd. (1 from 1,623 patents)
4 patents:
1. 6190339 - Massage device
2. 5729401 - Automatic cassette changer including shiftable driven rollers for a
3. 5128816 - Automatic cassette changer for front loading type magnetic
4. 4807066 - Cassette changer for magnetic recording-reproduction apparatus