The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 16, 2003
Filed:
Nov. 20, 2000
Tetsuo Suzuki, Tokyo, JP;
Nihon Kohden Corporation, Tokyo, JP;
Abstract
Three current supply lines and connection terminals thereof for respectively driving the light emitting diodes on the probe side are arranged in a light emitting diode driving circuit on the measurement apparatus body side, a pair of driving switches Sw A, Sw B and Sw A, Sw B for constant current having contact points to be switched to the electric power source side or the ground side are respectively connected with the two current supply lines among the three current supply lines, and switching operation signal supply lines A, A and B, B are arranged for successively and continuously driving the light emitting diodes by supplying a switching operation signal for switching the contact points on the electric power source side or on the ground side to the pair of driving switches for constant current.