Average Co-Inventor Count = 1.29
ph-index = 3
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. Globe-union Inc. (1 from 161 patents)
3 patents:
1. D289213 - Canister vacuum
2. D288014 - Hand vacuum nozzle and housing
3. D284463 - Battery container