1
Mutsuo Ogawa: Facsimile transmission method and system. Ricoh, Frank J Jordan, December 28, 1976: US04000371 (44 worldwide citation)

Two facsimile devices, each capable of operating in a plurality of communication modes and having at least one common communication mode are connected together by a telephone line. One of the devices sends to the other a plurality of low and high group frequency signals arranged in a code designatin ...


2
Mutsuo Ogawa, Yuji Koseki, Yuichi Saitoh, Shingo Yamaguchi, Shigeru Katsuragi: Facsimile apparatus. Ricoh Company, David G Alexander, October 27, 1981: US04297727 (33 worldwide citation)

Scanning and recording operations are performed by separate mechanical and electronic units. Signal processing, run length encoding and decoding operations are performed by a microcomputer on a priority interrupt basis utilizing at least two sections of a random access memory. The microcomputer oper ...


3
Mutsuo Ogawa, Noboru Murayama, Akira Konishi, Norisada Takeuchi: Facsimile transceiver. Ricoh Company, David G Alexander, September 22, 1981: US04291339 (18 worldwide citation)

A scanner scans an original document in two orthogonal directions and produces binary data signals representing the document. An extractor combines each two scan lines into one scan line by taking the logical sum of the data signals in corresponding positions in the two original scan lines. Each sec ...


4
Mutsuo Ogawa: Heat sensitive recording system in facsimile communication. Ricoh Company, Guy W Shoup, Leighton K Chong, July 26, 1988: US04760462 (14 worldwide citation)

A heat-sensitive recording system for use in a facsimile communication network is provided. The present recording system is structured to use the same image information in multiple times under certain circumstances to keep the thermal recording head at a constant temperature. Accordingly, the image ...


5
Mutsuo Ogawa: Facsimile set. Ricoh, Cooper Dunham Clark Griffin & Moran, June 8, 1976: US03962534 (12 worldwide citation)

A facsimile system capable of automatically transmitting or receiving the image through a telephone channel is disclosed in which each facsimile set may automatically reset its facsimile recorder and reader when the intercommunication with the other subscriber's facsimile set is interrupted by an ac ...


6
Mutsuo Ogawa: Optoelectronic scanning apparatus. Ricoh Company, David G Alexander, August 12, 1980: US04217611 (12 worldwide citation)

Main scan pulses are applied to a CCD charge accumulation type linear photosensor array to effect horizontal scan of a linear portion of a light image of an original document focussed on the array. The document is moved by one increment each time the array is scanned to effect vertical scan. Scannin ...


7
Mutsuo Ogawa, Takemi Hashimoto, Kazuyuki Hara, Mitsuru Kondo: Facsimile transceiver utilizing orthogonal conversion. Ricoh Company, David G Alexander, October 28, 1986: US04620233 (11 worldwide citation)

A scanning array (12) comprising a plurality of photosensor elements (12a) is reciprocated perpendicular to the axis (12b) thereof to scan a rectangular area of an original document (69). After scanning the area, the document (69) is moved parallel to the axis (12b) of the scanning array (12) and th ...


8
Mutsuo Ogawa: Facsimile apparatus. Ricoh Company, Oblon Fisher Spivak McClelland & Maier, August 9, 1983: US04398222 (10 worldwide citation)

A facsimile apparatus capable of transmitting and receiving image information, which is provided with an image information extraction apparatus for extracting the image information read by an image information read apparatus, at predetermined intervals, so that a monitor copy of the image informatio ...


9
Mutsuo Ogawa: Failure mode control apparatus for electronic graphic data transmission system. Ricoh, Frank J Jordan, September 5, 1978: US04112467 (10 worldwide citation)

In a data transmission system comprising, for example, a facsimile transmitter connected to a facsimile receiver through a public telephone network, failure or malfunction sensors are provided at the transmitter and receiver which generate failure signals having the same frequency as the telephone n ...


10
Mutsuo Ogawa, Matsuo Yomogida, Takamitsu Abe, Hideaki Matsuda: Image forming system. Tohoku Ricoh, Oblon Spivak McClelland Maier & Neustadt P C, November 16, 2004: US06819446 (9 worldwide citation)

When a holder of an ID card approaches an image formation instructing device for sending an image forming instruction to an image forming apparatus, an ID code stored in a RF-ID element built in the ID card is read by a RF communication device, an image forming operation is executed, and the number ...