Average Co-Inventor Count = 3.00
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. Denki Kagaku Kogyo Kabushiki Kaisha (2 from 475 patents)
2. Sony Corporation (1 from 58,130 patents)
3. Toppan Printing Co., Ltd. (1 from 1,268 patents)
4 patents:
1. 6128156 - Device for driving tape-like recording medium
2. 5321073 - Rubber composition
3. 4882622 - Silhouette cutting apparatus
4. 4792581 - Rubber composition