Average Co-Inventor Count = 1.30
ph-index = 4
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. Kabushiki Kaisha Nagaoka (4 from 8 patents)
2. Shin-etsu Chemical Co., Ltd. (1 from 5,973 patents)
3. Nagaoka Co., Ltd. (1 from 30 patents)
5 patents:
1. D288018 - Case for a compact disc surface cleaning device and compact disc
2. 4628388 - Head cleaning apparatus
3. 4569098 - Disc-cleaning device
4. 4128909 - Roller for cleaning phonograph records
5. 4089530 - Phonographic stylus