Average Co-Inventor Count = 1.96
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. North American Philips Lighting Corp. (2 from 25 patents)
2. North American Philips Corporation (1 from 950 patents)
3 patents:
1. D302473 - Compact fluorescent lamp
2. D302472 - Compact fluorescent reflector lamp
3. 4792726 - Fluorescent lamp unit with integral ballast housing