Average Co-Inventor Count = 4.44
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. Nkk Corporation (2 from 614 patents)
2. Toyo Ink Mfg. Co., Ltd. (1 from 105 patents)
2 patents:
1. 5057691 - Dilution material, filter and accessory for measuring infrared spectra
2. 4923762 - Precoated steel sheet for two-piece can