Inventor
NAKATA KAZUO
JP20 patents
⚠️ This page may combine multiple inventors who share the name “NAKATA KAZUO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
6 patentsUS4653098AMar 24, 1987
Method and apparatus for extracting speech pitch
HITACHI LTD63 citations96
US4720862AJan 19, 1988
Method and apparatus for speech signal detection and classification of the detected signal into a voiced sound, an unvoiced sound and silence
HITACHI LTD35 citations92
US4283601AAug 11, 1981
Preprocessing method and device for speech recognition device
HITACHI LTD38 citations92
US4088838AMay 9, 1978
Voice response system
HITACHI LTD32 citations92
US4340781AJul 20, 1982
Speech analysing device
HITACHI LTD17 citations73
US4211897AJul 8, 1980
Multifrequency signal receiving system
HITACHI LTD12 citations69
ISHIHARA MINING & CHEMICAL CO
5 patentsUS4539261ASep 3, 1985
Process for producing magnetic powder and product
ISHIHARA MINING & CHEMICAL CO16 citations72
US4414245ANov 8, 1983
Process for producing cobalt containing ferromagnetic iron oxides
ISHIHARA MINING & CHEMICAL CO9 citations70
US4501774AFeb 26, 1985
Process for the production of cobalt-containing magnetic iron oxide powder
ISHIHARA MINING & CHEMICAL CO5 citations60
US4486467ADec 4, 1984
Process for producing cobalt-containing magnetic iron oxide powder
ISHIHARA MINING & CHEMICAL CO3 citations59
US4560544ADec 24, 1985
Process for the preparation of acicular α-FeOOH for magnetic recording materials
ISHIHARA MINING & CHEMICAL CO3 citations56