1
Roger H Appeldorn, John C Nelson, Mark E Gardiner, Timothy L Hoopman: Cube-corner retroreflective articles having tailored divergence profiles. Minnesota Mining & Manufacturing Company, Donald M Sell, Roger R Tamte, October 4, 1988: US04775219 (232 worldwide citation)

Cube-corner retroreflective article having improved divergence profiles. The three lateral reflecting faces of the cube-corner retroreflective elements are formed by three intersecting sets of parallel V-shaped grooves, and at least one of the sets includes, in a repeating pattern, at least two groo ...


2
Richard C Nilsson, Gary W Edmundson, John C Nelson: Optical fiber cable having spliced fiber branch and method of making the same. Alcatel NA Cable Systems, Ware Fressola Van Der Sluys & Adolphson, May 11, 1993: US05210812 (156 worldwide citation)

A branch point for an optical fiber stub or drop cable from a main distribution cable has an optical fiber cable splice module for protecting the optical fibers and splices from moisture and mechanical damage, providing a strong anchoring point for the optical fiber drop cable, and insuring that the ...


3
John C Nelson, Sanford Cobb Jr: High efficiency retroreflective material. Minnesota Mining and Manufacturing Company, Donald M Sell, Walter N Kirn, Robert H Jordan, January 23, 1990: US04895428 (143 worldwide citation)

The present invention provides a retroreflective material which has improved retroreflectivity at high angles of incidence. The retroreflective material comprises a transparent surface layer and an array of reflecting elements, each of the reflecting elements including a rectangular base having a le ...


4
John C Nelson, Mark E Gardiner, Roger H Appeldorn, Timothy L Hoopman: High efficiency cube corner retroflective material. Minnesota Mining and Manufacturing Company, Donald M Sell, Walter N Kirn, Robert H Jordan, July 3, 1990: US04938563 (137 worldwide citation)

The present invention provides a retroreflective material which is efficient at high angles of incidence and which may be individually tailored so as to distribute light retroreflected by the material into a desired pattern or divergence profile. The retroreflective material of the present invention ...


5
Richard C Nilsson, John C Nelson: Preterminated fiber optic cable. Alcatel NA Cable Systems, Ware Fressola Van Der Sluys & Adolphson, June 9, 1992: US05121458 (125 worldwide citation)

A predetermined optical fiber cable has a main trunk cable comprising a plurality of optical fibers disposed therein and multiple drop cables spliced to the trunk cable at various branch points, the preterminated fiber optic cable being completely assembled at the time of manufacture and is easily i ...


6
Robert S Moshrefzadeh, Patrick A Thomas, John C Nelson, Theodore W Hodapp, Hsin Hsin Chou, Richard J Pokorny, Raghunath Padiyath: Rear projection screen using internal reflection. 3M Innovative Properties Company, Stephen W Buckingham, Altera Law Group, July 9, 2002: US06417966 (56 worldwide citation)

An optically dispersing film for a rear projection system includes reflecting surfaces disposed so as to reflect light passing therethrough into at least one dispersion plane. The reflecting surfaces are formed by structures, of a first refractive index, disposed within a layer of material having a ...


7
John C Nelson, Robert L Brott: Autostereoscopic display with fresnel lens element and double sided prism film adjacent a backlight having a light transmission surface with left and right eye light sources at opposing ends modulated at a rate of at least 90 hz. 3M Innovative Properties Company, July 6, 2010: US07750982 (55 worldwide citation)

An autostereoscopic display is described. The autostereoscopic display apparatus includes a backlight having opposing first and second light input surfaces and a light transmission surface extending between the opposing first and second light input surfaces and a right eye light source located to pr ...


8
John C Nelson: Lens. Minnesota Mining and Manufacturing Company, Donald M Sell, James A Smith, Stephen W Buckingham, July 5, 1988: US04755921 (46 worldwide citation)

A lens of a transparent material including a structured surface on one side and a smooth surface on the opposite side. The structured surface includes a plurality of three-faceted prisms arranged side by side to form a plurality of ridges and grooves. Each prism has a reflective surface adjacent to ...


9
Robert S Moshrefzadeh, Steven J Rhyner, Peter F Cullen, Patrick A Thomas, Richard J Pokorny, John C Nelson: Microstructured rear projection screen. 3M Innovative Properties Company, Robert J Pechman, October 21, 2003: US06636355 (33 worldwide citation)

Disclosed is a rear projection screen that includes a plurality of tapered waveguides and a light absorbing layer disposed over the tops of the waveguides, but that does not completely fill the spaces between the waveguides, thereby forming an interstitial low index region under the light absorbing ...


10
Daniel W Hennen, Robert S Moshrefzadeh, John C Nelson, Scott M Tapio, Patrick A Thomas: Fresnel lens for projection screen. 3M Innovative Properties Company, William D Miller, June 18, 2002: US06407859 (32 worldwide citation)

The present invention is a screen, such as is used in back-lit projection screens, having a Fresnel lens laminated to another layer for support. The screen includes a Fresnel lens having an output surface, and a dispersing screen supportingly attached on a first side to the output surface of the Fre ...