Average Co-Inventor Count = 4.61
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. Rolm Company (3 from 43 patents)
2. Rolm Systems (1 from 24 patents)
4 patents:
1. 5276731 - Method and apparatus for handling incoming telephone calls
2. 5263083 - Method and apparatus for sharing speakerphone processor among multiple
3. 5241586 - Voice and text annotation of a call log database
4. 5136637 - Method and apparatus for automatic redialing of telephone numbers