Average Co-Inventor Count = 1.88
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. Matsushita Electric Works, Ltd. (5 from 1,623 patents)
5 patents:
1. 4899442 - Hand-held clipper for removing entangled fiber strands from the surface
2. 4630933 - Electrically operated clock and shaver combination
3. 4428117 - Reciprocating type electric shaver
4. 4060972 - Digital clock
5. 4057957 - Alarm device of clocks