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. Nippon Aleph Corporation (1 from 10 patents)
2. Nippon Aleph Co., Ltd. (1 from 4 patents)
3. Gestetner International Limited (1 from 1 patent)
2 patents:
1. 5184149 - Combination of magnetic card and printing apparatus therefor
2. 4630074 - Multiple-stylus electrode for discharge printing