Average Co-Inventor Count = 5.08
ph-index = 3
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 Construction Machinery Co., Ltd. (4 from 1,498 patents)
2. Hitachi Kenki Fine Tech Co., Ltd. (1 from 7 patents)
5 patents:
1. 6698291 - Ultrasonic inspection apparatus
2. 6112593 - Portable non-destructive inspection device and support casing therefor
3. 5481917 - Ultrasonic inspection and imaging instrument
4. D350294 - Control unit for an ultrasonic flaw detector
5. D349464 - Ultrasonic flaw detector system