P

Inventor

SUGIYAMA HIROSHI

JP111 patents
⚠️ This page may combine multiple inventors who share the name “SUGIYAMA HIROSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

CANON KK

14 patents

TAKASAGO PERFUMERY CO LTD

10 patents
US6083651AJul 4, 2000

Phenothiazine or phenoxazine derivative, charge-transporting material comprising the same, and electrophotographic photoreceptor

TAKASAGO PERFUMERY CO LTD54 citations96
US5942615AAug 24, 1999

Phenothiazine or phenoxazine derivative, charge-transporting material comprising the same, and electrophotographic photoreceptor

TAKASAGO PERFUMERY CO LTD73 citations96
US6172264B1Jan 9, 2001

Triphenylamine derivative, charge-transporting material comprising the same, and electrophotographic photoreceptor

TAKASAGO PERFUMERY CO LTD19 citations92
US5989765ANov 23, 1999

Triphenylamine derivative, charge-transporting material comprising the same, and electrophotographic photoreceptor

TAKASAGO PERFUMERY CO LTD24 citations92
US5567560AOct 22, 1996

Triphenylamine derivative charge-transporting material containing electrophotographic photoreceptor

TAKASAGO PERFUMERY CO LTD23 citations92
US6150065ANov 21, 2000

Electrophotographic photoreceptor

TAKASAGO PERFUMERY CO LTD16 citations83
US5910610AJun 8, 1999

Triphenylamine derivative, charge-transporting material comprising the same, and electrophotographic photoreceptor

TAKASAGO PERFUMERY CO LTD13 citations82
US5882813AMar 16, 1999

Electrophotographic photoreceptor

TAKASAGO PERFUMERY CO LTD15 citations74
US5736284AApr 7, 1998

Carbazole derivative charge transporting material using the same and electrophotographic photoreceptor

TAKASAGO PERFUMERY CO LTD10 citations74
US5573878ANov 12, 1996

Triphenylamine derivative, charge-transporting material comprising the same, and electrophotographic photoreceptor

TAKASAGO PERFUMERY CO LTD12 citations74

TOSHIBA KK

7 patents

IKEDA BUSSAN CO

3 patents

PANASONIC CORP

3 patents

JAPAN SCIENCE & TECH CORP

2 patents

FUJITSU LTD

2 patents

CHIYODA CHEM ENG CONSTRUCT CO

2 patents

NIPPON TELEGRAPH & TELEPHONE

1 patent

WISCONSIN ALUMNI RES FOUND

1 patent

TOAGOSEI CO LTD

1 patent

MINOLTA CO LTD

1 patent

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD

1 patent

SUGIYAMA HIROSHI

1 patent

CHUGAI PHARMACEUTICAL CO LTD

1 patent

Showing the top 50 of 111 patents by PatentIndex Score.