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OTSUGA NORIO

Overview
  • Total Patents
    31
About

OTSUGA NORIO has a total of 31 patent applications. Its first patent ever was published in 1987. It filed its patents most often in Japan, Australia and United States. Its main competitors in its focus markets civil engineering, mechanical elements and environmental technology are YU SEONG SEOK, DEA DUK CHEMISTRY CO LTD and OH KANG WON.

Patent filings in countries

World map showing OTSUGA NORIOs patent filings in countries

Patent filings per year

Chart showing OTSUGA NORIOs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Otsuga Norio 31

Latest patents

Publication Filing date Title
US2012020740A1 Connection structure for a manhole pipe and a sewer main pipe
JP2006138350A Rubber washer and manhole connector
JP2005098068A Manhole body and manhole connector
JP2005273294A Manhole connection body
JP2004332465A Joint for manhole
JP2004116164A Connection device for manhole
JP2004084349A Invert of manhole
JP2003239305A Connecting structure of sewer main pipe and manhole
JP2003090077A Connecting construction between manhole and sewer main pipe
JP2003184161A Branch pipe for piping connection
JP2003184115A Connecting structure between manhole and sewer mains
JP2003129552A Connecting construction between main sewer pipe and branch pipe
JP2003129507A Connecting structure between manhole and sewage main
JP2003003557A Connection structure of lateral duct to main drainage
WO0202882A1 Manhole joint device
JP2002302993A Connecting structure of manhole and sewage main pipe
JP2002242218A Lid cover for manhole
JP2002242212A Lid cover for split type manhole
JPH11241355A Invert joint for manhole
JPH11241354A Invert joint for manhole