Average Co-Inventor Count = 3.75
ph-index = 3
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. (5 from 4,979 patents)
2. Oki Information Systems, Co., Ltd. (1 from 1 patent)
5 patents:
1. 6257475 - Apparatus for issuing a ticket
2. 6253996 - Medium handling apparatus
3. 6092798 - Ticket issuing apparatus
4. 5813774 - Ticket-printing device and ribbon assembly adapted for easy ribbon
5. 4992647 - Ticket processing terminal device which accepts previously issued