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Publication numberUSD340696 S
Publication typeGrant
Application numberUS 07/792,059
Publication dateOct 26, 1993
Filing dateNov 13, 1991
Publication number07792059, 792059, US D340696 S, US D340696S, US-S-D340696, USD340696 S, USD340696S
InventorsJohn B. Barrett
Original AssigneeAppoint
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Ball-operated control device for electronic circuits
US D340696 S
Images(1)
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Claims(1)
  1. The ornamental design for a ball-operated control device for electronic circuits, as shown and described.
Description

FIG. 1 is a perspective view of a ball-operated control device for electronic circuits showing my new design;

FIG. 2 is a top plan view of the device;

FIG. 3 is a bottom plan view of the device;

FIG. 4 is a side elevational view of the device;

FIG. 5 is a front elevational view of the device; and,

FIG. 6 is a rear elevational view of the device.

Non-Patent Citations
Reference
1Trackball controls on p. 17 of Measurement Systems, Inc. catalog C584, Oct. 18, 1984.
2Trackball controls on p. 18 of Measurement Systems, Inc. catalog C584, Oct. 18, 1984.
Classifications
U.S. ClassificationD13/158, D14/417