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Takao Fukazawa
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Tokyo, JP
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last 30 patents
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Patent Grant
Multi-tone recording method for ink jet printer
Patent number
4,642,653
Issue date
Feb 10, 1987
Ricoh Company, Ltd.
Tadashi Ito
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Control system and method for charge control ink jet printer
Patent number
4,604,631
Issue date
Aug 5, 1986
Ricoh Company, Ltd.
Koichiro Jinnai
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Deflection control ink jet printing apparatus
Patent number
4,598,299
Issue date
Jul 1, 1986
Ricoh Company, Ltd.
Takahisa Koike
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Multicolor ink jet recording apparatus having means for preventing...
Patent number
4,595,948
Issue date
Jun 17, 1986
Ricoh Company, Ltd.
Tadashi Itoh
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Ink jet printing apparatus
Patent number
4,437,101
Issue date
Mar 13, 1984
Ricoh Company, Ltd.
Yutaka Ebi
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Apparatus for detecting deflection of a charged ink droplet.
Patent number
4,430,658
Issue date
Feb 7, 1984
Ricoh Company, Ltd.
Takao Fukazawa
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Analog signal delay circuit
Patent number
4,271,366
Issue date
Jun 2, 1981
Ricoh Co., Ltd.
Takuro Isayama
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Drive circuit for ink jet discharging head
Patent number
4,245,224
Issue date
Jan 13, 1981
Ricoh Co., Ltd.
Takuro Isayama
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Ink filter clogging sensor and indicator
Patent number
4,183,029
Issue date
Jan 8, 1980
Ricoh Company, Ltd.
Takuro Isayama
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS