Average Co-Inventor Count = 3.00
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. Other (1 from 832,718 patents)
2. Toshiba Engineering Corporation (1 from 15 patents)
2 patents:
1. 6530284 - Geographical displacement sensing unit and monitoring apparatus using the same
2. 6119535 - Underground water level sensing unit and ground monitoring system using