Average Co-Inventor Count = 1.35
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. Kabushiki Kaisha Daini Seikosha (3 from 349 patents)
2. Other (1 from 832,891 patents)
3. Seiko Instruments & Electronics Ltd. (1 from 127 patents)
5 patents:
1. 6761259 - Moving handrail for passenger conveyor
2. D278038 - Pocket watch
3. D261734 - Wristwatch
4. D252138 - Wristwatch case
5. D246575 - Watch case