David A. Engler has been granted 12 US patents while listed as an inventor at 3M . The first was granted in 1987 and the most recent in December 2010. David A. Engler ranks #396,045 of 4,157,543 US inventors in our database (top 9.5%). Patent records list David A. Engler in Woodbury, MN, US.
Patents per Year Patents granted per year, 1987 to 2010 Bar chart with a peak of 3 patents in 2003. peak 3 1987: 1 patents 1987 1992: 1 patents 1992 2002: 2 patents 2002 2003: 3 patents 2003 2004: 1 patents 2004 2006: 1 patents 2006 2007: 1 patents 2007 2008: 1 patents 2008 2010: 1 patents 2010
Issued Patents All Time
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Showing 1–12 of 12 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
7858976 Method of making an organic light emitting device Raghunath Padiyath , Jon E. Ottman , Fred B. McCormick , Donald J. McClure , Brian J. Gates 2010-12-28
$19,358,000
7432124 Method of making an organic light emitting device Raghunath Padiyath , Jon E. Ottman , Fred B. McCormick , Donald J. McClure , Brian J. Gates 2008-10-07
$55,464,000
7271534 Segmented organic light emitting device Raghunath Padiyath , Jon E. Ottman 2007-09-18
$28,688,000
7057599 Microstructures with assisting optical lenses Rolf W. Biernath , John C. Nelson 2006-06-06
$17,448,000
6700695 Microstructured segmented electrode film for electronic displays Rolf W. Biernath 2004-03-02
$27,834,000
6577432 Post and pocket microstructures containing moveable particles having optical effects Rolf W. Biernath 2003-06-10
$22,620,000
6570700 Microstructures with assisting optical elements to enhance an optical effect Rolf W. Biernath , John C. Nelson 2003-05-27
$17,300,000
6521145 Reflective particle display film and method of manufacture Brit G. Billingsley , William D. Miller , Richard J. Pokorny 2003-02-18
$14,780,000
6480322 Method of improving the respondability of moveable structures in a display Rolf W. Biernath 2002-11-12
$19,373,000
6383619 Reflective particle display film and method of manufacture Brit G. Billingsley , William D. Miller , Richard J. Pokorny 2002-05-07
$13,972,000
5110655 Removable, high temperature resistant retroreflective marking material Britton G. Billingsley 1992-05-05
$9,878,000
4695608 Continuous process for making polymers having pendant azlactone or macromolecular moieties Anthony Robert Maistrovich 1987-09-22
$11,188,000
