Geometrical instruments – Distance measuring
Reexamination Certificate
2007-05-01
2007-05-01
Bennett, G. Bradley (Department: 2859)
Geometrical instruments
Distance measuring
C033S707000, C033S773000
Reexamination Certificate
active
10556695
ABSTRACT:
Provided is a distance calculating apparatus calculating a real distance from a map distance of a map path connecting a first point and a second point on a map, the apparatus including: a housing; a scale input unit into which a reduced scale is input, disposed in the housing; an optical sensor unit disposed in the housing, the optical sensor unit sensing movement of the housing using light and outputting an electrical signal when the housing is moved along the map path; a calculation unit disposed in the housing, the calculation unit calculating the map distance using the electrical signal input from the optical sensor unit and calculating the real distance using the map distance and the reduced scale input from the scale input unit; and a display unit disposed in the housing, the display unit displaying the real distance calculated by the calculation unit. The distance calculating apparatus can conveniently and accurately obtain the real distance by only inputting a reduced scale of a map and moving the apparatus along a path connecting two points on the map.
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Bennett G. Bradley
Thelen Reid Brown Raysman & Steiner LLP
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