1
Kiyoshi Sakai, Mitsuru Hashimoto, Tomiko Kawakami: Electrophotographic element with carbazole hydrazone or anile charge transport compounds. Ricoh, Blanchard Flynn Thiel Boutell & Tanis, October 27, 1981: US04297426 (123 worldwide citation)

An electrophotographic element comprising a conductive substrate and a mono-layer type or multi-layer type photosensitive layer, superposed thereon, containing a photoconductive material in which said photoconductive material is a hydrazone compound having the following general formula (I) or an ani ...


2
Kiyoshi Sakai, Mitsuru Hashimoto, Tomiko Kawakami: Electrophotographic element with a phenyhydrazone charge transport layer. Ricoh Company, Blanchard Flynn Thiel Boutell & Tanis, July 6, 1982: US04338388 (75 worldwide citation)

An electrophotographic element is prepared by forming a photoconductive layer containing a hydrazone compound therein on an electroconductive support member. The hydrazone compounds represented by the following general formula, are useful as photoconductive materials and as charge transport material ...


3
Kiyoshi Sakai: Charge transfer layer with styryl hydrazones. Ricoh, Flynn Thiel Boutell & Tanis, May 24, 1983: US04385106 (74 worldwide citation)

The present invention provides a novel hydrazone compound expressed by the general formula I ##STR1## (wherein Ar represents substituted or non-substituted naphthyl group, anthryl group, styryl group, pyridyl group, thienyl group, furyl group or carbazolyl group.);


4
Kiyoshi Sakai, Takashi Itoh, Kiichi Matsuda: Video signal coding apparatus, coding method used in the video signal coding apparatus and video signal coding transmission system having the video signal coding apparatus. Fujitsu, Staas & Halsey, August 10, 1993: US05235618 (65 worldwide citation)

A signal coding apparatus, which is coupled, via a transmission path, to a receiver having a receiver buffer and a decoder, includes a coding unit for coding a signal and outputting information generated in a frame unit, the information being a coded signal. The apparatus also includes a transmitter ...


5
Yoshio Takasu, Norie Takebayashi, Kiyoshi Sakai, Minoru Mabuchi, Shozo Ishikawa: Electrophotographic photosensitive member. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, August 16, 1983: US04399208 (59 worldwide citation)

An electrophotographic photosensitive member is characterized by having a layer containing at least one hydrazone compound represented by the following formula [I] or [II]: ##STR1## wherein R.sub.11 and R.sub.12 represent hydrogen, halogen, substituted or unsubstituted alkyl, alkoxy, substituted or ...


6
Kiyoshi Sakai, Minoru Mabuchi, Shozo Ishikawa, Makoto Kitahara: Electrophotographic photosensitive member with hydrazone compound. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, August 16, 1983: US04399207 (54 worldwide citation)

An electrophotographic photosensitive member having a layer containing at least one compound represented by the formula ##STR1## wherein X.sub.1 represents a residue necessary for completing a substituted or unsubstituted aromatic hydrocarbon ring; X.sub.2 represents a residue necessary for completi ...


7
Takeo Kazami, Kiyoshi Sakai, Mitsuru Hashimoto, Masaomi Sasaki, Kyoji Tsutsui, Masafumi Ohta: Electrophotographic element having charge transport layer. Ricoh, Blanchard Flynn Thiel Boutell & Tanis, January 13, 1981: US04245021 (53 worldwide citation)

An electrophotographic element according to the present invention exhibits an exceedingly high sensitivity and it comprises (1) an electroconductive support, a charge producing layer consisting essentially of a charge producing substance and a charge transport layer consisting essentially of a charg ...


8
Kiyoshi Sakai: Electrophotographic element containing hydrazone compounds in charge transport layers. Ricoh, Flynn Thiel Boutell & Tanis, June 7, 1983: US04387147 (50 worldwide citation)

An electrophotographic element which comprises a conductive substrate and a photosensitive layer, superposed thereon, consisting of a charge generation layer and a charge transport layer, said charge transport layer containing as an available ingredient a hydrazone compound having the following gene ...


9
Kohji Yamada, Kiyoshi Sakai: Method and apparatus for image signal encoding. Fujitsu, Staas & Halsey, October 5, 2004: US06801572 (37 worldwide citation)

A method and an apparatus to realize high quality image signal encoding at a variable bit rate, which is provided by the first quantization scale—maximum data volume calculation unit that calculates the maximum data volume and the first quantization scale based on encoding results of an encoded imag ...


10
Akihiro Yamori, Takashi Hamano, Kiyoshi Sakai, Kouji Yamada: Moving pictures encoding method and apparatus for detecting a scene change between fields of an interlaced image. Fujitsu, Katten Muchin Rosenman, November 18, 2008: US07453941 (34 worldwide citation)

An encoding method, which achieves encoding efficiency, and good picture quality encoding even when there exists a picture in which a scene change occurs within an interlaced frame, is provided. A moving pictures encoding method treats a frame of interlaced image input signals as a picture, and perf ...