Average Co-Inventor Count = 4.41
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. Hitachi, Ltd. (4 from 42,485 patents)
2. Hitachi Video Engineering, Incorporated (3 from 66 patents)
3. Panasonic Corporation (1 from 16,453 patents)
4. Hitachi Engineering Ltd (1 from 7 patents)
5 patents:
1. 8744097 - Microphone device
2. 5315460 - Magnetic recording and reproducing apparatus including S fixed chassis
3. 5124854 - Cassette loading apparatus having an inner cassette holder supported on
4. 5119257 - Rotary head device having a motor within the rotary drum, and magnetic
5. 5065264 - Capstan arrangement for a magnetic recording/reproduction apparatus