Average Co-Inventor Count = 2.40
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. Laurel Bank Machine Co., Ltd. (2 from 131 patents)
2. Kabushiki Kaisha Sanyo Danki Seisakusho (1 from 1 patent)
3 patents:
1. 4977994 - Fare adjustment machine for prepaid card type tickets
2. 4635661 - Automatic coin depositing and paying machine
3. 4558712 - Automatic coin depositing and paying machine