Average Co-Inventor Count = 2.40
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. Longyear Company (1 from 18 patents)
2. Kilman Electriloc Inc. (1 from 1 patent)
3. Kilman Electriloc Company (1 from 1 patent)
3 patents:
1. 5525006 - Flush mount well protector
2. 5479799 - Key and bolt lock device
3. 5404959 - Drill rig safety shutdown device