IP Library › Granted Patent US 6,620,538
Granted Patent Utility
US 6,620,538 · Confirmation No. 3417

METHOD AND APPARATUS FOR MONITORING EQUIVALENT SERIES RESISTANCE AND FOR SHUNTING A FUEL CELL

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2011-01-20 N570 Communication - Re: Power of Attorney (PTOL-308) 1 View
2011-01-20 N570 Communication - Re: Power of Attorney (PTOL-308) 1 View
2011-01-10 PA.. Power of Attorney 1 View
2011-01-10 R3.73 Assignee showing of ownership per 37 CFR 3.73 2 View
2011-01-10 N417 Electronic Filing System Acknowledgment Receipt 2 View
2003-07-21 IFEE Issue Fee Payment (PTO-85B) 1 View
2002-01-23 TRNA Transmittal of New Application 3 View
2002-01-23 A.PE Preliminary Amendment 5 View
2002-01-23 SPEC Specification 52 View
2002-01-23 CLM Claims 23 View
2002-01-23 ABST Abstract 1 View
2002-01-23 DRW Drawings-only black and white line drawings 14 View
2002-01-23 OATH Oath or Declaration filed 3 View
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Quick Facts
Patent No.
US 6,620,538
App. No.
10/056,543
Filed
2002-01-23
Granted
2003-09-16
Pub. No.
US20030138683A1
Art Unit
1745
PTA
-120 days