IP Library › Granted Patent US 6,668,571
Granted Patent Utility PCT National Stage
US 6,668,571 · Confirmation No. 3313

REFRIGERANT COMPRESSOR DRIVEN BY VARIABLE SUPPLY FREQUENCY MOTOR

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2012-11-01 N570 Communication - Re: Power of Attorney (PTOL-308) 1 View
2012-11-01 N570 Communication - Re: Power of Attorney (PTOL-308) 1 View
2012-10-22 PA.. Power of Attorney 1 View
2012-10-22 R3.73 Assignee showing of ownership per 37 CFR 3.73 1 View
2012-10-22 N417 Electronic Filing System Acknowledgment Receipt 2 View
2003-11-03 IFEE Issue Fee Payment (PTO-85B) 1 View
2002-02-12 LET. Miscellaneous Incoming Letter 22 View
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Quick Facts
Patent No.
US 6,668,571
App. No.
09/980,998
Filed
2002-02-12
Effective Filing
2001-12-03
Granted
2003-12-30
Art Unit
3744
PTA
0 days