Average Co-Inventor Count = 2.40
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. North American Philips Electric Corp. (4 from 21 patents)
2. Westinghouse Electric Corporation (3 from 8,033 patents)
7 patents:
1. D275327 - Compact fluorescent lamp unit
2. D274560 - Compact fluorescent lamp unit
3. D272653 - Compact fluorescent lamp
4. D271424 - Compact fluorescent lamp unit
5. 4375607 - Compact lamp unit having plug-in fluorescent lamp and module components
6. 4318160 - Fluorescent lamp conversion unit
7. 4241386 - Fluorescent lamp adapter for residential incandescent-type lamp fixture