IP Library › Granted Patent US 6,667,490
Granted Patent Utility
US 6,667,490 · Confirmation No. 1003

NEGATIVE DIFFERENTIAL RESISTANCE DEVICE

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2011-03-17 C.AD Change of Address 2 View
2011-03-17 N417 Electronic Filing System Acknowledgment Receipt 2 View
2011-01-28 N570 Communication - Re: Power of Attorney (PTOL-308) 1 View
2011-01-28 N570 Communication - Re: Power of Attorney (PTOL-308) 1 View
2011-01-19 PA.. Power of Attorney 2 View
2011-01-19 R3.73 Assignee showing of ownership per 37 CFR 3.73 1 View
2011-01-19 N417 Electronic Filing System Acknowledgment Receipt 2 View
2009-10-15 N570 Communication - Re: Power of Attorney (PTOL-308) 1 View
2009-10-15 N570 Communication - Re: Power of Attorney (PTOL-308) 1 View
2009-10-05 PA.. Power of Attorney 1 View
2009-10-05 LET. Miscellaneous Incoming Letter 1 View
2009-10-05 R3.73 Assignee showing of ownership per 37 CFR 3.73 1 View
2009-10-05 C.AD Change of Address 1 View
2009-10-05 N417 Electronic Filing System Acknowledgment Receipt 2 View
2003-09-29 IFEE Issue Fee Payment (PTO-85B) 1 View
2003-09-29 LET. Miscellaneous Incoming Letter 3 View
2002-10-23 TRNA Transmittal of New Application 5 View
2002-10-23 SPEC Specification 10 View
2002-10-23 CLM Claims 2 View
2002-10-23 ABST Abstract 1 View
2002-10-23 DRW Drawings-only black and white line drawings 2 View
2002-10-23 OATH Oath or Declaration filed 3 View
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Quick Facts
Patent No.
US 6,667,490
App. No.
10/279,184
Filed
2002-10-23
Granted
2003-12-23
Pub. No.
US20030043660A1
Examiner
TRAN, LONG K
Art Unit
2818
PTA
-86 days