US PATENT SUBCLASS 73 / 1.85
.~.~ Seismic (e.g., geophone) or with optical sensor

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


73 /   HD   MEASURING AND TESTING

1.01  DF  INSTRUMENT PROVING OR CALIBRATING {13}
1.82  DF  .~ Apparatus for measuring by use of vibration or apparatus for measuring vibration (e.g., acoustic or ultrasonic) {4}
1.85.~.~ Seismic (e.g., geophone) or with optical sensor

DEFINITION

Classification: 73/1.85

Seismic (e.g., geophone) or with optical sensor:

(under subclass 1.82) Subject matter wherein either (a) the apparatus for proving or calibrating the device or (b) the device being proven or calibrated includes either (1) a device relating to an earthquake or earth tremor or (2) a device whose optical characteristic changes in response to sensing vibration.

SEE OR SEARCH THIS CLASS, SUBCLASS:

653, for a sensing apparatus having an inertial element with a light beam indicator.

SEE OR SEARCH CLASS

367, Communications, Electrical: Acoustic Wave Systems and Devices,

13, for testing, monitoring, or calibrating acoustic wave systems or devices used for electrical communications.