Average Co-Inventor Count = 4.00
ph-index = 1
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. Oki Electric Industry Co., Ltd. (2 from 4,979 patents)
2. Oki Information Systems, Co., Ltd. (1 from 1 patent)
2 patents:
1. 6092798 - Ticket issuing apparatus
2. 5813774 - Ticket-printing device and ribbon assembly adapted for easy ribbon