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. Sears, Roebuck & Company (2 from 65 patents)
2. National Service Industries, Inc. (1 from 55 patents)
2 patents:
1. D261851 - Housing for hand vacuum and the like
2. D252772 - Lighting fixture