Average Co-Inventor Count = 1.62
ph-index = 5
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. Marpac Corporation (7 from 13 patents)
7 patents:
1. D559721 - Safety light cover
2. 6497493 - Illuminated safety helmet
3. 6406164 - Safety light
4. D364404 - Sound conditioner
5. D347008 - Sound conditioner
6. D335129 - Synthesized telephone call announcer
7. D311065 - Sound conditioner for masking intruding noises