Inventor
HIYOKAWA TOYOJI
JP20 patents
⚠️ This page may combine multiple inventors who share the name “HIYOKAWA TOYOJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
AISIN AW CO
16 patentsUS5825306AOct 20, 1998
Navigation system for vehicles
AISIN AW CO177 citations99
US5931888AAug 3, 1999
Navigation system for vehicles with alternative route searching capabilities
AISIN AW CO244 citations98
US5774073AJun 30, 1998
Navigation system for a vehicle
AISIN AW CO151 citations98
US6034626AMar 7, 2000
Navigation system for a vehicle
AISIN AW CO97 citations97
US6333702B1Dec 25, 2001
Navigation device
AISIN AW CO68 citations96
US5793631AAug 11, 1998
Voice route-guidance system and method having a function for judging approachment to a decision point
AISIN AW CO66 citations96
US6243646B1Jun 5, 2001
Vehicle navigation system with pixel transmission to display
AISIN AW CO73 citations94
US5991689ANov 23, 1999
Navigation system with switching between an ordinary road preferential mode and a tall road preferential mode
AISIN AW CO84 citations94
US6047235AApr 4, 2000
Vehicular navigation system
AISIN AW CO85 citations93
US6415225B1Jul 2, 2002
Navigation system and a memory medium
AISIN AW CO44 citations92
US6424363B1Jul 23, 2002
Image display device, method of image display, and storage medium for storing image display programs
AISIN AW CO40 citations90
US6345230B1Feb 5, 2002
Vehicle navigation system and method
AISIN AW CO17 citations82
US8370061B2Feb 5, 2013
Navigation device and navigation road data creating device
AISIN AW CO3 citations62
US10861332B2Dec 8, 2020
Communication terminal, server device, route retrieval system, and computer program
AISIN AW CO1 citations61
US10145698B2Dec 4, 2018
Route search system, route search method, and computer program
AISIN AW CO0 citations50
US10132638B2Nov 20, 2018
Route search system, route search method, and computer program
AISIN AW CO0 citations39