1
Masahiro Hara, Motoaki Watabe, Tadao Nojiri, Takayuki Nagaya, Yuji Uchiyama: Optically readable two-dimensional code and method and apparatus using the same. Nippondenso, Kabushiki Kaisha Toyota Chuo Kenkyusho, Cushman Darby & Cushman IP Group of Pillsbury Madison & Sutro, March 10, 1998: US05726435 (298 worldwide citation)

A two-dimensional code 1 consists of three positioning symbols 2, a data region 3, timing cells 4 and an apex detecting cell 5. The shape of the whole code 1 is a square having the same number of vertical and lateral cells. A scanning line passing through the center of each positioning symbols 2 alw ...


2
Masahiro Hara, Atutoshi Okamoto, Toshiyasu Sakai, Tadao Oshima, Hiroshi Yamamoto, Hiromitsu Takai: Apparatus for optically reading printed information. Nippondenso, Cushman Darby & Cushman, April 4, 1989: US04818847 (212 worldwide citation)

Apparatus for optically reading printed information by radiating light onto printed information to be reflected thereby, receiving the reflected light through an optical system and converting the image of the reflected light into a corresponding electric signal. The light source employs red light em ...


3
Toshiyasu Sakai, Masahiro Hara, Nobuyuki Teraura: Optical reading apparatus having a reading sensor of electronic scanning type. Nippondenso, Cushman Darby & Cushman, August 27, 1985: US04538060 (184 worldwide citation)

In an optical reading apparatus having a reading sensor for converting optically readable information into an electrical signal by electronically scanning an image of optical information, such as a bar code, a detector is provided to detect the intensity of light incident on an information label on ...


4
Masahiro Hara, Toshiyasu Sakai: Optical reading apparatus with automatic gain control circuit. Nippondenso, Cushman Darby & Cushman, July 9, 1985: US04528444 (173 worldwide citation)

In an optical reading apparatus having a reading sensor for converting optically readable information into an electrical analog signal, an automatic gain control circuit is provided to maintain the amplitude of the electrical signal constant. The gain of the automatic gain control circuit is control ...


5
Xuhua Yang, Masahiro Hara: Two-dimensional code reading apparatus. Denso Corporation, Pillsbury Madison & Sutro, December 14, 1999: US06000614 (119 worldwide citation)

A two-dimensional code reading apparatus uses the image of a reference pattern of a known shape in the two-dimensional code to compute areas, shapes and positions of cells in the image of the two-dimensional code and corrects these computed values using correction values obtained by identifying cell ...


6
Masahiro Hara, Atsutoshi Okamoto, Toshiyasu Sakai: Method and apparatus for reading a bar code. Nippondenso, Cushman Darby & Cushman, December 18, 1984: US04488678 (83 worldwide citation)

A bar code having parallel bars carrying information is divided into a plurality of regions so that each region is detected by a field of vision of an image sensor of a bar code reader. The bars in each region are detected by a scanning operation to store data indicative of the width of each bar int ...


7
Masahiro Hara, Motoaki Watabe: Two dimensional code reading apparatus. Nippondenso, Cushman Darby & Cushman IP Group of Pillsbury Madison & Sutro, November 25, 1997: US05691527 (63 worldwide citation)

A two-dimensional code reading apparatus including a CCD sensor that captures an image including a two-dimensional code attached on an article being conveyed, for example. The two-dimensional code is formed as a matrix of light and dark cells, and includes at least two orientation symbols at corners ...


8
Masahiro Hara, Atsutoshi Okamoto, Toshiyasu Sakai: High-sensitive optical reading apparatus and method of reading optical information. Nippondenso, Cushman Darby & Cushman, May 7, 1985: US04516017 (62 worldwide citation)

In an optical reading apparatus having an image sensor for converting optically readable information into an electrical signal, a sensor driving circuit is arranged to produce at least two clocks with which two or more groups of optical imaging elements of the image sensor are respectively driven. I ...


9
Masahiro Hara, Toshiyasu Sakai, Atsutoshi Okamoto: Bar code scanner. Nippondenso, Cushman Darby & Cushman, October 4, 1983: US04408120 (45 worldwide citation)

A bar code scanner for scanning bar codes having a plurality of parallel bar symbols recorded in different light reflective colors on a record medium. The scanner has a light source, an image sensor comprising a plurality of light responsive elements which are aligned and activated one by one, and d ...


10
Masahiro Hara: Method for displaying and reading information code for commercial transaction. Denso Wave Incorporated, Posz Law Group, February 14, 2006: US06997384 (29 worldwide citation)

An optical information reader for settling a commercial transaction reads and decodes with certainty a quick response (QR) code displayed on a buyer's mobile telephone display. A QR code 11 is displayed on the display a plurality of times at a prescribed time interval. The QR code is rotated by 90° ...