Average Co-Inventor Count = 1.71
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 Corporation (1 from 950 patents)
2. Philips Electronics North America Corporation (1 from 838 patents)
2 patents:
1. 5493170 - High efficiency sealed beam reflector lamp
2. 4701667 - Expandable starting aid ring for fluorescent lamp