Inventor
UCHIDA RIICHI
JP11 patents
⚠️ This page may combine multiple inventors who share the name “UCHIDA RIICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
9 patentsUS4664601AMay 12, 1987
Operation control system of rotary displacement type vacuum pump
HITACHI LTD64 citations95
US4487563ADec 11, 1984
Oil-free rotary displacement compressor
HITACHI LTD63 citations95
US4984974AJan 15, 1991
Screw type vacuum pump with introduced inert gas
HITACHI LTD65 citations93
US4770609ASep 13, 1988
Two-stage vacuum pump apparatus and method of operating the same
HITACHI LTD38 citations92
US4174196ANov 13, 1979
Screw fluid machine
HITACHI LTD46 citations92
US4993930AFeb 19, 1991
Vacuum pump apparatus and shaft sealing device therefor
HITACHI LTD24 citations91
US4767284AAug 30, 1988
Screw vacuum pump unit
HITACHI LTD37 citations89
US4714418ADec 22, 1987
Screw type vacuum pump
HITACHI LTD31 citations89
US4963079AOct 16, 1990
Screw fluid machine with high efficiency bore shape
HITACHI LTD15 citations73