Average Co-Inventor Count = 1.54
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. Nec Corporation (6 from 35,705 patents)
2. Amgen Inc. (1 from 1,974 patents)
3. Teijin Pharma Limited (1 from 125 patents)
7 patents:
1. 9365522 - Pyrazole amide derivative
2. 5416887 - Method and system for speech recognition without noise interference
3. 5222121 - Voice recognition dialing unit
4. 5201004 - Speech recognition method with noise reduction and a system therefor
5. 5022068 - Branched telephone system
6. 4955055 - Loudspeaking telephone with a frequency shifting circuit
7. 4899380 - Loudspeaking telephone with a variable gain circuit