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Theodore J Szczech: Retroreflective material with improved angularity. Minnesota Mining and Manufacturing Company, Douglas B Little, Gary L Griswold, Walter N Kirn, August 11, 1992: US05138488 (154 worldwide citation)

The present invention provides an improved cube-corner retroreflective article that exhibits a wide range of retroreflective angularity in multiple viewing planes. The present invention provides cube-corner retroreflective elements having a decreased size, as measured by the height of the cube corne ...


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Susan K Nestegard, Gerald M Benson, Cheryl M Frey, John C Kelliher, James E Lasch, Kenneth L Smith, Theodore J Szczech: Dual orientation retroreflective sheeting. 3M Innovative Properties Company, Stephen C Jensen, August 10, 1999: US05936770 (81 worldwide citation)

A cube corner retroreflective sheeting construction comprising alternating zones of cube corner element arrays disposed at approximately ninety degrees orientations to provide exactly two principal plane of improved retroreflective performance in response to light incident on the sheeting at high en ...


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Susan K Nestegard, Gerald M Benson, Cheryl Frey, John C Kelliher, James E Lasch, Kenneth L Smith, Theodore J Szczech: Dual orientation retroreflective sheeting. Minnesota Mining and Manufacturing Company, Jed W Caven, Robert H Jordan, Stephen C Jensen, January 6, 1998: US05706132 (80 worldwide citation)

A cube corner retroreflective sheeting construction comprising alternating zones of cube corner element arrays disposed at approximately ninety degrees orientations to provide exactly two principal plane of improved retroreflective performance in response to light incident on the sheeting at high en ...


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Norbert L Johnson, Theodore J Szczech, Bruce D Orensteen: Cube corner article with altered inactive areas and method of making same. 3M Innovative Properties Company, Stephen C Jensen, August 17, 1999: US05940212 (22 worldwide citation)

A reflective article has a structured surface which includes geometric structures each having at least three specularly reflecting faces which converge at an apex or other extremity. The article is marked with a plurality of spots located between the extremities, the spots having different reflectiv ...


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Theodore J Szczech, Toshitaka Nakajima, Mark D Fiegen: Dual use reflective article. 3M Innovative Properties Company, Stephen C Jensen, Rudolph P Hofmann Jr, September 19, 2000: US06120879 (3 worldwide citation)

A reflective article has a structured surface which includes a first and second array of reflective elements. The first array includes elements which have at least a first, second, and third reflecting face arranged to retroreflect incident light in a retroreflected beam. The second array includes e ...


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