Average Co-Inventor Count = 1.31
ph-index = 4
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. The Singer Company (6 from 1,246 patents)
6 patents:
1. D264139 - Surface cleaning nozzle
2. D263842 - Supply tank for use with a carpet cleaning machine
3. D258064 - Carpet cleaning machine
4. D249691 - Guiding and locking device for electrical cords
5. D248303 - Canister vacuum cleaner or similar articles
6. D248104 - Upright vacuum cleaner