Average Co-Inventor Count = 1.56
ph-index = 5
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. Seikosha Co., Ltd. (10 from 696 patents)
2. Hitachi, Ltd. (3 from 42,508 patents)
13 patents:
1. D584703 - Television receiver
2. D566068 - Television receiver
3. D563916 - Television receiver
4. 5457664 - Energy saving timepiece
5. D357884 - Clock movement
6. D357885 - Clock movement
7. D333998 - Clock movement
8. D326427 - Clock movement
9. 5113796 - Feeder
10. D326064 - Clock movement
11. 5062382 - Feeder
12. 5037018 - Automatic feeder
13. 4821257 - Electricity supply structure for a piezoelectric vibrator