Inventor
NAGATSUMA HIDEAKI
JP4 patents
Patents
4 patentsUS6532432B1Mar 11, 2003
Portable GPS velosity/distance meter
SEIKO INSTR INC78 citations97
US6449583B1Sep 10, 2002
Portable measurement apparatus
SEIKO INSTR INC97 citations97
US6285314B1Sep 4, 2001
Portable GPS type distance/speed meter capable of changing sampling period of GPS signal in response to arm swinging period
SEIKO INSTR INC88 citations97
US6388613B1May 14, 2002
Portable GPS type distance/speed meter capable of selectively using doppler speed measuring method
SEIKO INSTR INC78 citations95