IP Library › Granted Patent US 6,646,581
Granted Patent Utility
US 6,646,581 · Confirmation No. 8601

DIGITAL-TO-ANALOG CONVERTER CIRCUIT INCORPORATING HYBRID SIGMA-DELTA MODULATOR CIRCUIT

Inventor: Yunteng Huang
Patented Case View Patent ↗
⬇ PDF
 Code Description Pages PDF
2012-09-06 N570 Communication - Re: Power of Attorney (PTOL-308) 1 View
2012-09-06 N570 Communication - Re: Power of Attorney (PTOL-308) 1 View
2012-08-18 PA.. Power of Attorney 1 View
2012-08-18 LET. Miscellaneous Incoming Letter 1 View
2012-08-18 N417 Electronic Filing System Acknowledgment Receipt 2 View
2012-08-18 R3.73 Assignee showing of ownership per 37 CFR 3.73 2 View
2007-06-20 PA.. Power of Attorney 2 View
2007-06-20 N417 Electronic Filing System Acknowledgment Receipt 2 View
2003-09-17 IFEE Issue Fee Payment (PTO-85B) 1 View
2002-07-02 TRNA Transmittal of New Application 3 View
2002-07-02 ADS Application Data Sheet 2 View
2002-07-02 SPEC Specification 43 View
2002-07-02 CLM Claims 10 View
2002-07-02 ABST Abstract 1 View
2002-07-02 DRW Drawings-only black and white line drawings 27 View
2002-07-02 OATH Oath or Declaration filed 2 View
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this application's details
Quick Facts
Patent No.
US 6,646,581
App. No.
10/188,784
Filed
2002-07-02
Granted
2003-11-11
Art Unit
2819
PTA
0 days