Average Co-Inventor Count = 2.25
ph-index = 6
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. Cairns & Brother Inc. (5 from 25 patents)
2. Mine Safety Appliances Company (1 from 242 patents)
6 patents:
1. 6298249 - Radio apparatus head-protective helmet
2. 6032297 - Head-protective helmet and assemblies thereof
3. 5996126 - Crown pad and head-protective helmet
4. 5937439 - Combination head and eye-protective apparatus and goggles
5. 5898949 - Head-protective helmet mounting member for mounting helmet components
6. 5845341 - Combination head and eye-protective apparatus and goggles