Average Co-Inventor Count = 3.43
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. Matsushima Kogyo Kabushiki Kaisha (2 from 6 patents)
2 patents:
1. 4916413 - Package for piezo-oscillator
2. 4677397 - Quartz crystal oscillator with crystal supported on spring