Average Co-Inventor Count = 2.40
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 832,812 patents)
2. Martin Marietta Corporation (1 from 490 patents)
2 patents:
1. 4532674 - Hinge assembly with over-center latch
2. 4112179 - Method of coating with ablative heat shield materials