The SIGMA trademark was assigned a Serial Number #72305075 – by the United States Patent and Trademark Office (USPTO). Trademark Serial Number is a unique ID to identify the SIGMA mark in USPTO. The SIGMA mark is filed in the category of Electronic Machines. The legal correspondent for SIGMA trademark is ?, Domestic Representative - Not Found Prosecution History Date Description Proceeding Number Nov. 04, 1992 EXPIRED SEC. 9 Oct. 17, 1990 CANCELLATION TERMINATED NO. 999999 15861 Aug. 22, 1989 CANCELLAT . The current status of the SIGMA filing is This registration was not renewed and therefore has expired..
Based on SIGMA INSTRUMENTS, INC., the SIGMA trademark is used in the following business: DIGITAL DATA PROCESSING SYSTEMS AND SYSTEM UNITS, INCLUDING DIGITAL COMPUTERS, MEMORY UNITS, INPUT-OUTPUT PROCESSORS, INPUT-OUTPUT DEVICES, SYSTEMS INTERFACE UNITS, AND COMMUNICATION UNITS.
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