Average Co-Inventor Count = 2.00
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. Seikosha Co., Ltd. (3 from 696 patents)
3 patents:
1. 5452270 - Melody alarm timepiece
2. 5303211 - Wall clock
3. D335098 - Clock movement