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Expired patents of:
Ricoh Company, Ltd.

Displaying 51 to 100 of 162 patents. (Retrieval took 4.135 seconds.)

 Patent TitleExpired:
51.Facsimile apparatus2005-12-02
52.Copier with document support moving means2005-11-30
53.Cleaning unit with a cleaning member made of activated carbon fibers2005-11-23
54.Control system for controlling object at constant state2005-11-23
55.Memory system, memory control system and image processing system2005-11-20
56.Fluid-releasable image transfer sheet2005-11-13
57.Automatic document feeder capable of feeding a document in the form of computer form paper2005-11-09
58.Thermal image transfer recording medium2005-11-09
59.Signal processing apparatus having at least one neural network having pulse density signals as inputs and outputs2005-11-02
60.Apparatus and method for changing bus line address for a detachable battery unit2005-10-30
61.Camera which displays information to a user corresponding to a message imprinted on film2005-10-28
62.Ozone decomposing material and ozone decomposing apparatus using the ozone decomposing material2005-10-26
63.Fixing apparatus2005-10-21
64.Finisher for an image forming apparatus2005-10-19
65.Picture signal binarization apparatus avoiding a need for memory devices or shift registers for storing binary picture signals before output2005-10-12
66.Recording and reproducing timing generating apparatus2005-10-12
67.Method and regenerating image support from used image-bearing support2005-10-07
68.Charging apparatus for controlling supplement of electric current to a rechargeable battery2005-10-07
69.Thermosensitive recording material2005-10-05
70.Image signal processing method and apparatus with correction for a secondary light source effect2005-10-05
71.Power supply system2005-09-30
72.Polyether amine compounds2005-09-28
73.Image reading apparatus2005-09-28
74.Semiconductor device including via hole2005-09-16
75.Image forming apparatus which reduces noise generated therefrom2005-09-14
76.Color image forming apparatus for use with a recording medium having a laterally extending registration mark2005-09-14
77.Image transfer sheet, preparation method thereof and image formation method and image transfer method using the image transfer sheet2005-09-04
78.Multifunctional image processing for preventing printer interruption2005-08-28
79.Switching power supply2005-08-26
80.Image supporting sheet2005-08-19
81.Finisher for an image forming apparatus2005-08-17
82.Color image forming equipment responsive to changes in ambient conditions2005-08-17
83.Image forming apparatus and controller thereof2005-08-17
84.Facsimile apparatus which stores image data in a bulk storage device2005-08-17
85.Document feeding method for a recycling automatic document feeder2005-08-03
86.Automatic document feeder capable of handling computer form document2005-07-27
87.Focusing error detection apparatus using a first and second knife edge at different positions2005-07-27
88.Magneto-optical recording/reproducing apparatus with light beam splitting means2005-07-27
89.Optical disk drive apparatus2005-07-27
90.Birefringence measuring apparatus and method of measuring birefringence2005-07-24
91.Data multiplexing and separation method2005-07-13
92.Data transmission device used together with system interface having improved data transmission performance2005-07-08
93.Facsimile machine having recording/reproducing apparatus2005-07-06
94.Zoom finder2005-06-24
95.Tracking servo method used in an optical disk drive unit2005-06-22
96.Conductive particle arranging device and conductive particle transferring method using the same2005-06-19
97.Image formation method using color toners2005-06-19
98.Optical disk with identification phase-encoded area2005-06-15
99.Modem unit2005-06-03
100.Complementary mis semiconductor device of dual gate structure having a silicide layer including a thinned portion2005-05-27

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