Average Co-Inventor Count = 2.67
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. Mu Company Ltd. (1 from 3 patents)
2. Kabushiki Kaisha Sigma (1 from 3 patents)
2 patents:
1. 5745540 - Portable bill counter detecting forgeries
2. 4840290 - Bulk loaded coin dispensing machine