Communications – electrical: acoustic wave systems and devices – Distance or direction finding – With electromagnetic wave
Reexamination Certificate
2009-04-28
2011-11-22
Tarcza, Thomas (Department: 3662)
Communications, electrical: acoustic wave systems and devices
Distance or direction finding
With electromagnetic wave
C367S124000, C367S127000, C178S018040, C178S019020
Reexamination Certificate
active
08064290
ABSTRACT:
A pen transcription system and method for using the same are disclosed. The pen transcription system includes a receiver having first and second acoustical sensors mounted on a planar base and separated from one another, an EM detector, and a controller. The first and second acoustical sensors detect an acoustical signal at a first wavelength emitted by a moveable signal source. The EM detector detects an EM signal that is synchronized with the acoustical signal. The controller measures the difference in time of detection between the EM signal and the acoustical signals detected by the first and second acoustical sensors. The acoustical sensors include a detector and a housing surrounding the detector, the housing having an aperture having a maximum dimension that is less than the first wavelength divided by 6.28.
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International Search Report, PCT/US2010/028533, Dec. 17, 2010, all pages.
Ding Yao
Harel Jacob
Misko Timothy Alan
Hulka James
Luidia Inc.
Tarcza Thomas
Ward Calvin B.
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