Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural ranges – scales or registration rates
Reexamination Certificate
2007-10-02
2007-10-02
Nguyen, Ha Tran (Department: 2829)
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural ranges, scales or registration rates
Reexamination Certificate
active
11067953
ABSTRACT:
A range-changing circuit includes an array of graduated impedances in serial relationship, and a voltage sensing and limiting switch across one of said impedances. The switch limits the voltage across said one of the impedances in response to a voltage sensed by the switch.
REFERENCES:
patent: 4395678 (1983-07-01), Pelta
patent: 5451881 (1995-09-01), Finger
Banaska John G.
Goeke Wayne C.
Keithley Instruments Inc.
Nguyen Ha Tran
Nguyen Trung Q.
Pearne & Gordon LLP
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