Learn more

KORANSHA KK

Overview
  • Total Patents
    140
About

KORANSHA KK has a total of 140 patent applications. Its first patent ever was published in 1974. It filed its patents most often in Japan, WIPO (World Intellectual Property Organization) and United States. Its main competitors in its focus markets materials and metallurgy, machines and thermal processes are MANVILLE SERVICE CORP, LOUIS BONNET and FURUKAWA SHIGENOBU.

Patent filings per year

Chart showing KORANSHA KKs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Kurita Sumihiko 133
#2 Nakajima Masumi 44
#3 Takeshita Masaaki 28
#4 Matsuki Masaharu 15
#5 Nakamura Hiroshi 14
#6 Yoshihara Toshiaki 11
#7 Eguchi Toru 10
#8 Nakashima Masazumi 9
#9 Hiwatari Isao 8
#10 Ichinose Masanobu 8

Latest patents

Publication Filing date Title
JP2007102144A Optical reflector
WO2005040911A1 Heat-resistance refractor and optical device mounted with same
JP2005148687A Reflector for projector having superior lamp rupture resistance
JP2004022533A High pressure lamp
JP2003146676A Sintered compact of colored glass and method of manufacturing the same
JP2002362967A Member for semiconductor wafer etching consisting of silica glass sintered compact and production method therefor
JP2002311292A Ferrule for optical fiber connector
JP2002239891A Inner face polishing method for cone-shaped member
JP2002182068A Quartz glass ferrule and method for manufacturing the same
JP2002120061A Porous filter for casting molten metal casting
JP2001347364A Porous filter for molding molten metal
JP2000169231A Oxidation-resistant carbon-based material
JPH11189427A Production of sintered silica glass
JPH11157938A Compound sintered compact of hexagonal boron nitride and carbon, and its production
JPH11157941A Ceramic sintered compact
JPH11109115A Mirror for lamp
JPH10278150A Soundproof and heat-insulating material
JPH10280158A Formation of nitride and carbide coating
JPH10180419A Continuous casting method
JPH10101437A Forming of powder assuming sintering