Multiple analyses of the first published D2P patent ( D2P Patent 7,184,723) finds that neither novelty nor feasibility was demonstrated.

Appendix 1: Statistics from USPTO and WIPO Searches (4/7/2005)

US Patents

US Pending Patent Applications

International Applications

Note that the color bars shows one patent application having multiple amendments.
Yellow highlights indicate an issued patent.

Patents and Patent Applications Pending – A more Recent Look

Title: ParkerVision Receives Sixth Wireless Patent
Date: 3/5/2002; Publication: PR Newswire;

Title: ParkerVision Receives Fifth Wireless Patent
Date: 7/24/2001; Publication: PR Newswire;
Further Strengthens D2D Intellectual Property Position

JACKSONVILLE, Fla., July 24 /PRNewswire/ –
ParkerVision, Inc. (Nasdaq: PRKR) today received its fifth U.S. patent for its unique Direct2Data(TM) wireless semiconductor technology, which is in the process of being commercialized for the wireless LAN and cellular markets.

Title: ParkerVision Receives Patent For Its Core D2D Transmitter Technology
Date: 7/18/2000; Publication: PR Newswire;
Unique Transmitter Architecture Applicable to Wide Range of Wireless Applications

Title: ParkerVision Receives Third D2D Patent
Date: 5/11/2000; Publication: PR Newswire;
Technology Enables Robust Signal Reception While Reducing Required Bandwidth

Title: ParkerVision Receives Patent for its Core D2D Receiver Technology
Date: 5/9/2000; Publication: PR Newswire;
Unique Architecture Contravenes Traditional RF Engineering;
Allows for Smaller, More Reliable Radios With Less Power Consumption

Title: ParkerVision Receives First Patent for Its Wireless Technology

Date: 4/11/2000; Publication: PR Newswire; Industry’s First RF Filtering and Direct Down Conversion In a Unified Operation
More than 40 Other Wireless Patent Applications on File and In Process

Appendix for ParkerVision Patents: Patent Related Press Releases - April 27, 2005