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TOPRE CORP
JP31 patents
Top patents by PatentIndex Score
US4772874ASep 20, 1988
Keyboard apparatus
TOPRE CORP39 citations93
US4659879AApr 21, 1987
Key switch
TOPRE CORP39 citations93
US4406397ASep 27, 1983
Central air conditioning equipment
TOPRE CORP76 citations92
US4633900AJan 6, 1987
Constant airflow control apparatus for air conditioning
TOPRE CORP41 citations89
US4553696ANov 19, 1985
Air conditioning apparatus
TOPRE CORP38 citations89
US4907468AMar 13, 1990
Pedal effort-reduction apparatus
TOPRE CORP29 citations86
US4851626AJul 25, 1989
Key switch device
TOPRE CORP27 citations86
US4800774AJan 31, 1989
Pedal-load lightening apparatus
TOPRE CORP37 citations86
US4584444AApr 22, 1986
Keyboard switch
TOPRE CORP54 citations86
US4449664AMay 22, 1984
Air quantity regulating apparatus for air conditioning
TOPRE CORP32 citations86
US10325734B1Jun 18, 2019
Keyboard switch
TOPRE CORP11 citations84
US9061341B2Jun 23, 2015
Hot-pressing device and method of manufacturing hot-pressed product
TOPRE CORP4 citations73
USD696577SDec 31, 2013
Self-piercing clinch nut
TOPRE CORP5 citations73
US4878056AOct 31, 1989
Key input circuit
TOPRE CORP7 citations71
US4491061AJan 1, 1985
Air conditioning system
TOPRE CORP18 citations68
US4807145AFeb 21, 1989
Method and apparatus for measuring the shape, size, etc., of a rotary tool
TOPRE CORP12 citations64
US11951526B2Apr 9, 2024
Press-formed product manufacturing method and forming die
TOPRE CORP0 citations63
USD696578SDec 31, 2013
Self-piercing clinch nut
TOPRE CORP2 citations63
US4482932ANov 13, 1984
Keyboard switch
TOPRE CORP6 citations63
US10265753B2Apr 23, 2019
Hot press product
TOPRE CORP2 citations62
US9328509B2May 3, 2016
Square pipe, frame structure, square pipe manufacturing method, and square pipe manufacturing apparatus
TOPRE CORP2 citations59
US9017798B2Apr 28, 2015
Press-formed product
TOPRE CORP2 citations59
US11471928B2Oct 18, 2022
Positioning device for hot stamping
TOPRE CORP0 citations57
US11097332B2Aug 24, 2021
Method for manufacturing hot pressed product
TOPRE CORP0 citations42
US10671183B2Jun 2, 2020
Keyboard device
TOPRE CORP0 citations42
US9174260B2Nov 3, 2015
Hot press product and method of forming the same
TOPRE CORP1 citations41
US10684700B2Jun 16, 2020
Keyboard threshold change apparatus and keyboard
TOPRE CORP0 citations32
US12580567B2Mar 17, 2026
Key switch device and key switch control method
TOPRE CORP0 citations31
US11621710B2Apr 4, 2023
Capacitance switch
TOPRE CORP0 citations31
US10217578B2Feb 26, 2019
Keyboard
TOPRE CORP0 citations20
US9979392B2May 22, 2018
Capacitive keyboard
TOPRE CORP0 citations20