Average Co-Inventor Count = 2.00
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 (3 from 65 patents)
3 patents:
1. 5413262 - Lumbar supporting belt
2. D322040 - Measuring tape
3. 5007178 - Measuring tape device