David L. Simpson has been granted 19 US patents while listed as an inventor at Ncr . The first was granted in 1990 and the most recent in August 2010. David L. Simpson ranks #229,345 of 4,157,543 US inventors in our database (top 5.5%). Patent records list David L. Simpson in West Columbia, SC, US.
Patents per Year Patents granted per year, 1990 to 2010 Bar chart with a peak of 6 patents in 1994. peak 6 1990: 1 patents 1990 1993: 3 patents 1993 1994: 6 patents 1994 1995: 2 patents 1995 1996: 1 patents 1996 2004: 1 patents 2004 2005: 2 patents 2005 2006: 1 patents 2006 2008: 1 patents 2008 2010: 1 patents 2010 Issued Patents All Time
Showing 1–19 of 19 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
RE41496 Boundary-scan input circuit for a reset pin Thomas L. Langford, II 2010-08-10
7468754 High-definition de-interlacing and frame doubling circuit and method Eric Stephen Carlsgaard , Michael Evan Crabb 2008-12-23
$105,000
7031206 Digital line delay using a single port memory Paul D. Filliman , Michael Dwayne Knox 2006-04-18
$418,000
6894726 High-definition de-interlacing and frame doubling circuit and method Eric Stephen Carlsgaard , Michael Evan Crabb 2005-05-17
$171,000
6839779 Counting a number of occurrences of a first RTS (ready to send) and a first RTR (ready to receive) signals for limiting a data transfer bandwidth through handshake suppression Didier Velez 2005-01-04
$318,000
6741436 Microprocessor-controlled DC to DC converter with fault protection Stephen K. Gilbert , Qlingchuan Li 2004-05-25
$26,979,000
5546592 System and method for incrementing memory addresses in a computer system — 1996-08-13
5432854 Stereo FM receiver, noise control circuit therefor Kazunari Honjo 1995-07-11
$51,301,000
5423050 Intermodule test across system bus utilizing serial test bus Mark A. Taylor , Chris Harrison , Larry C. James 1995-06-06
5377198 JTAG instruction error detection Mark A. Taylor 1994-12-27
5347520 Boundary-scan enable cell with non-critical enable path Wilson E. Smoak 1994-09-13
5343478 Computer system configuration via test bus Larry C. James , Carl W. Kagy , Jeffrey F. Gates , Jeffrey A. Hawkey , Thomas F. Heil 1994-08-30
5325368 JTAG component description via nonvolatile memory Larry C. James , Mark A. Taylor , Chris Harrison 1994-06-28
5319646 Boundary-scan output cell with non-critical enable path Wilson E. Smoak 1994-06-07
5313470 Boundary-scan input cell for a clock pin — 1994-05-17
5267191 FIFO memory system — 1993-11-30
5260948 Bidirectional boundary-scan circuit Edward W. Hutton, Jr. 1993-11-09
5260950 Boundary-scan input circuit for a reset pin Thomas L. Langford, II 1993-11-09
4933894 Circuit and method for adding binary numbers with a difference of one or less — 1990-06-12
$21,906,000
