Average Co-Inventor Count = 2.67
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. Daimler-benz Ag (1 from 1,777 patents)
2. Harman Becker Automotive Systems Gmbh (1 from 614 patents)
2 patents:
1. 7020606 - Voice recognition using a grammar or N-gram procedures
2. 6023677 - Speech recognition method