1
Tokuhiro Tsukiyama, Hiroshi Yashiki, Osamu Hirose: Method and apparatus for data compression and restoration. Hitachi, Hitachi Computer Peripherals Co, Kenyon & Kenyon, October 3, 1989: US04872009 (107 worldwide citation)

A method of data compression for recording data on a recording medium such as a magentic tape, a method of data restoration for data which has been compressed for recording, and an apparatus of data compression and restoration prescribe the data to be compressed based on type or value and encode the ...


2
Akihiko Kanouda, Minehiro Nemoto, Fumikazu Takahashi, Masahiro Hamaogi, Yoshihide Takahashi, Takashi Tanabe, Takao Gotou, Masato Isogai, Toshikatsu Miyata: DC backup power supply system. Hitachi, Hitachi Maxwell, Hitachi Computer Peripherals Co, Antonelli Terry Stout & Kraus, February 24, 2009: US07495415 (13 worldwide citation)

A DC backup power supply system having a battery a charge-discharge circuit for charging and discharging a power between the battery and a DC line and a control circuit for controlling the charge-discharge circuit, wherein the battery has a number of battery cells and cylindrical portions of the bat ...