Average Co-Inventor Count = 3.43
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. Citizen Electronics Co., Ltd. (2 from 608 patents)
2. Citizen Watch Company, Ltd. (1 from 2,002 patents)
2 patents:
1. 6504940 - Connecting device for connecting a sound producing device to an electronic equipment
2. 5476629 - Method for manufacturing IC card substrate