Inventor
YOSHIMIZU CHIKAI
JP36 patents
⚠️ This page may combine multiple inventors who share the name “YOSHIMIZU CHIKAI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI KOKI KK
30 patentsUS7185998B2Mar 6, 2007
Power tool
HITACHI KOKI KK135 citations99
US6679406B2Jan 20, 2004
Power tool
HITACHI KOKI KK113 citations99
US7934847B2May 3, 2011
Power tool with light unit
HITACHI KOKI KK48 citations98
US7048075B2May 23, 2006
Power tool
HITACHI KOKI KK56 citations96
US6905052B2Jun 14, 2005
Power tool
HITACHI KOKI KK45 citations96
US6495932B1Dec 17, 2002
DC power source unit
HITACHI KOKI KK72 citations96
US6172860B1Jan 9, 2001
DC power source unit alarming before electrically powered tool is overheated and stopping power supply thereafter
HITACHI KOKI KK66 citations96
US7108079B2Sep 19, 2006
Electric power tool
HITACHI KOKI KK45 citations95
US5816121AOct 6, 1998
Cordless fastening tool
HITACHI KOKI KK103 citations95
US6026668AFeb 22, 2000
Electrically-powered cutting and bending machine
HITACHI KOKI KK28 citations93
USD333767SMar 9, 1993
Portable cordless hammer
HITACHI KOKI KK21 citations93
US7681661B2Mar 23, 2010
Electric power tool
HITACHI KOKI KK25 citations92
US7665541B2Feb 23, 2010
Electric power tool with cover
HITACHI KOKI KK15 citations92
US7490746B2Feb 17, 2009
Power tool
HITACHI KOKI KK20 citations92
US7455121B2Nov 25, 2008
Power tool
HITACHI KOKI KK24 citations92
US7344054B2Mar 18, 2008
Power tool
HITACHI KOKI KK18 citations92
US7323796B2Jan 29, 2008
Motor-driven tool
HITACHI KOKI KK17 citations92
US7216723B2May 15, 2007
Pulse torque generator and power tool having the same
HITACHI KOKI KK29 citations92
US7140451B2Nov 28, 2006
Portable tool having cover and label to be stuck on the portable tool for identification
HITACHI KOKI KK61 citations92
US5974918ANov 2, 1999
Screw driving device
HITACHI KOKI KK37 citations92
US5931039AAug 3, 1999
Electrical bar cutting and bending tool
HITACHI KOKI KK38 citations89
US6938531B2Sep 6, 2005
Reciprocal-movement power tool
HITACHI KOKI KK29 citations88
US7541773B2Jun 2, 2009
Battery-powered tool capable of detecting discharged battery pack
HITACHI KOKI KK10 citations84
US10263228B2Apr 16, 2019
Electric device including sealing member between attachment part and battery pack
HITACHI KOKI KK7 citations83
US6661148B2Dec 9, 2003
Motor-driven tool
HITACHI KOKI KK15 citations83
US7368843B2May 6, 2008
Commutator motor
HITACHI KOKI KK8 citations73
US7064467B2Jun 20, 2006
Commutator motor
HITACHI KOKI KK7 citations73
US10547182B2Jan 28, 2020
Electric operating machine
HITACHI KOKI KK2 citations70
US7789281B2Sep 7, 2010
Electrically driven flywheel-fastener driver
HITACHI KOKI KK4 citations62
US7508109B2Mar 24, 2009
Commutator motor
HITACHI KOKI KK4 citations62