Average Co-Inventor Count = 1.64
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. Sugatsune Industrial Co., Ltd. (1 from 42 patents)
2. Instachord Corp. (1 from 2 patents)
3. Centarc, Inc. (1 from 1 patent)
3 patents:
1. D995623 - Keys for musical instrument
2. D940410 - Manual washing machine
3. D335812 - Door closer