Average Co-Inventor Count = 4.00
ph-index = 1
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. Hitachi Metals, Ltd. (3 from 2,333 patents)
2. Nippon Tungsten Co., Ltd. (3 from 57 patents)
3 patents:
1. 9293154 - Substrates for thin-film magnetic heads, magnetic head sliders, and hard disk drive devices
2. 9293155 - Substrates for thin-film magnetic heads, magnetic head sliders, and hard disk drive devices
3. 9293156 - Substrates for thin-film magnetic heads, magnetic head sliders, and hard disk drive devices