Average Co-Inventor Count = 3.20
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. Sears, Roebuck & Company (2 from 65 patents)
2 patents:
1. 6439345 - Item pick-up system
2. 5253345 - Point of sale register system