Average Co-Inventor Count = 1.00
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. Seiko Epson Corporation (3 from 33,418 patents)
2. Shiojiri Kogyo Kabushiki Kaisha (1 from 8 patents)
4 patents:
1. D323469 - Electronic metronome with clip
2. D319791 - Electronic metronome
3. D315518 - Electronic metronome
4. D297416 - Wrist watch