Inventor
HAGIWARA SEIJI
JP8 patents
⚠️ This page may combine multiple inventors who share the name “HAGIWARA SEIJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON TELEGRAPH & TELEPHONE
5 patentsUS5767810AJun 16, 1998
Microstrip antenna device
NIPPON TELEGRAPH & TELEPHONE103 citations96
US6265935B1Jul 24, 2001
Amplifier for radio transmission
NIPPON TELEGRAPH & TELEPHONE72 citations92
US5917450AJun 29, 1999
Antenna device having two resonance frequencies
NIPPON TELEGRAPH & TELEPHONE52 citations91
US5617105AApr 1, 1997
Antenna equipment
NIPPON TELEGRAPH & TELEPHONE46 citations91
US5568155AOct 22, 1996
Antenna devices having double-resonance characteristics
NIPPON TELEGRAPH & TELEPHONE44 citations91
NTT DOCOMO INC
3 patentsUS6343218B1Jan 29, 2002
Transmission power control method, mobile phone, base station, and recording medium
NTT DOCOMO INC159 citations95
US11356862B2Jun 7, 2022
Measuring method and measuring device
NTT DOCOMO INC0 citations61
US7088977B2Aug 8, 2006
Wireless communication apparatus and wireless communication method
NTT DOCOMO INC0 citations48