Average Co-Inventor Count = 1.50
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 832,761 patents)
2. Opex Corporation (1 from 151 patents)
2 patents:
1. 4123890 - Envelope opening apparatus and method
2. 3979884 - Mail extracting and sorting desk