David P Rowe

US Patent:

20220308281, Sep 29, 2022

Filed:

Oct 2, 2020

Appl. No.:

17/639025

Inventors:

- St. Paul MN, US
Gary T. Boyd - Woodbury MN, US
David A. Rosen - North St. Paul MN, US
Bharat R. Acharya - Woodbury MN, US
Kevin W. Gotrik - Hudson WI, US
David J. Rowe - Roseville MN, US
Caleb T. Nelson - McKinney TX, US

International Classification:

F21V 8/00
G02B 5/02
G02F 1/1333
G02F 1/1335

Abstract:

An optical system includes an extended illumination source configured to emit light from an extended emission surface thereof and a light redirecting layer disposed on the extended emission surface. The light redirecting layer has a structured major surface that includes a regular array of light redirecting structures, each light redirecting structure including a plurality of facets; and a plurality of discrete spaced apart window segments. The optical system includes a plurality of reflective segments where each reflective segment is disposed on a corresponding window segment. For substantially normally incident light, each reflective segment has a total: average optical reflectance of at least 30% in a visible wavelength range extending from about 420 nm to about 650 nm; and optical transmittance of at least 10% for at least one infrared wavelength in an infrared wavelength range extending from about 800 nm to about 1200 nm.

US Patent:

20220234382, Jul 28, 2022

Filed:

May 26, 2020

Appl. No.:

17/610498

Inventors:

- St. Paul MN, US
Scott J. Jones - Woodbury MN, US
Huiwen Tai - Lake Elmo MN, US
Joan M. Frankel - Woodbury MN, US
Robert R. Owings - Woodbury MN, US
Bhaskar V. Velamakanni - Woodbury MN, US
Jeanne M. Bruss - Cottage Grove MN, US
David J. Rowe - Roseville MN, US
Matthew E. Sousa - Rosemount MN, US
Bradley L. Givot - St. Paul MN, US

International Classification:

B44C 1/17
C23C 14/58

Abstract:

A transfer article with a thickness of less than 3 micrometers includes a first acrylate layer that is releasable from a metal or doped semiconductor release layer at a release value of from 2 to 50 grams/inch. The article includes a functional layer overlaying the first acrylate layer. The functional layer includes at least one microfractured inorganic layer about 3 nanometers to about 200 nanometers thick, which has a plurality of toolmarks interspersed with cracks.

US Patent:

20220214478, Jul 7, 2022

Filed:

Apr 24, 2020

Appl. No.:

17/605654

Inventors:

- St. Paul MN, US
Kui Chen-Ho - Woodbury MN, US
Graham M. Clarke - Woodbury MN, US
Scott J. Jones - Woodbury MN, US
Michael A. McCoy - St. Paul MN, US
Shri Niwas - Maple Grove MN, US
David J. Rowe - Roseville MN, US
Ying Xia - Woodbury MN, US

International Classification:

G02B 5/128

Abstract:

A retroreflective article comprises a binder layer and a plurality of retroreflective elements, each retroreflective element comprising a transparent microsphere partially embedded in the binder layer. At least some of the retroreflective elements comprise a first locally laminated layer and a second locally laminated layer that may be reflective layers. A transfer article comprises a disposable carrier layer in which the retroreflective article is detachably disposed with at least some of the transparent microspheres in contact with the disposable carrier layer.

US Patent:

20220206195, Jun 30, 2022

Filed:

Apr 24, 2020

Appl. No.:

17/605687

Inventors:

- St. Paul MN, US
Ying Xia - Woodbury MN, US
David J. Rowe - Roseville MN, US
Shri Niwas - Maple Grove MN, US
Michael A. McCoy - St. Paul MN, US
Scott J. Jones - Woodbury MN, US
Kevin W. Gotrik - Hudson WI, US
Graham M. Clarke - Woodbury MN, US
Lok-Man Ng - Hsinchu City, Taiwan, CN

International Classification:

G02B 5/124
G02B 5/128

Abstract:

A retroreflective article including a binder layer and a plurality of retroreflective elements. Each retroreflective element includes a transparent microsphere partially embedded in the binder layer. At least some of the retroreflective elements include a first layer that is disposed between the transparent microsphere and the binder layer and a second layer that is disposed between the transparent microsphere and the binder layer. At least one of the first layer and the second layer is a reflective layer; and, the first reflective layer and the second reflective layer differ in reflectivity. For at least some of the retroreflective elements, at least a portion of the second reflective layer is positioned in-parallel to the first reflective layer.

US Patent:

20230017223, Jan 19, 2023

Filed:

Sep 15, 2022

Appl. No.:

17/932471

Inventors:

- St. Paul MN, US
David J. Rowe - Roseville MN, US
Andrew H. Tilstra - Shoreview MN, US

International Classification:

H02N 1/00

Abstract:

At least some embodiments of the present disclosure an electrostatic sheet jamming device comprising a first sheet having a first conductive layer, a first dielectric layer disposed adjacent to the first conductive layer, and a second sheet comprising a second conductive layer and disposed proximate to the first dielectric layer. The first dielectric layer is disposed between the first conductive layer and the second conductive layer. The first sheet and the second sheet are non-extensible and flexible, wherein the first sheet and the second sheet are slidable relative to each other in a first state. The first sheet and the second sheet are jammed with each other in a second state when a voltage is applied between the first conductive layer and the second conductive layer. In some embodiments, the applied voltage is less than or equal to a break-down voltage of air at a distance between the first conductive layer and the second conductive layer.

US Patent:

20210273583, Sep 2, 2021

Filed:

Jun 26, 2019

Appl. No.:

17/252500

Inventors:

- St Paul MN, US
David J. Rowe - Roseville MN, US
Andrew H. Tilstra - Shoreview MN, US

International Classification:

H02N 1/00

Abstract:

At least some embodiments of the present disclosure an electrostatic sheet jamming device comprising a first sheet having a first conductive layer, a first dielectric layer disposed adjacent to the first conductive layer, and a second sheet comprising a second conductive layer and disposed proximate to the first dielectric layer. The first dielectric layer is disposed between the first conductive layer and the second conductive layer. The first sheet and the second sheet are non-extensible and flexible, wherein the first sheet and the second sheet are slidable relative to each other in a first state. The first sheet and the second sheet are jammed with each other in a second state when a voltage is applied between the first conductive layer and the second conductive layer. In some embodiments, the applied voltage is less than or equal to a break-down voltage of air at a distance between the first conductive layer and the second conductive layer.

US Patent:

20210257940, Aug 19, 2021

Filed:

Jun 26, 2019

Appl. No.:

17/252626

Inventors:

- St. Paul MN, US
David J. Rowe - Roseville MN, US
Andrew H. Tilstra - Shoreview MN, US

International Classification:

H02N 13/00
C23C 14/34
C23C 14/20
C23C 14/00
B32B 27/08
B32B 27/36

Abstract:

At least some embodiments of the present disclosure direct to an electrostatic sheet jamming device formed by a sheet having a conductive layer and a dielectric layer. The jamming device includes a first section of the sheet, the first section being separated from the sheet, and a second section of the sheet, the second section being separated from the sheet. The sheet is non-extensible and flexible. The first section and the second section are slidable relative to each other in a first state. The first section and the second section are jammed with each other in a second state when a voltage is applied between a conductive layer of the first section and a conductive layer of the second section.

US Patent:

20210257941, Aug 19, 2021

Filed:

Jun 26, 2019

Appl. No.:

17/252815

Inventors:

- St. Paul MN, US
David J. Rowe - Roseville MN, US
Andrew H. Tilstra - Shoreview MN, US
Michael Patrick M. Mandanas - Little Canada MN, US

International Classification:

H02N 13/00
C23C 14/34
C23C 14/20
C23C 14/00
B32B 27/08
B32B 27/36

Abstract:

At least some embodiments of the present disclosure direct to an electrostatic sheet jamming apparatus comprising a first sheet comprising a first conductive layer, the first sheet comprising a set of first features, a first dielectric layer, and a second sheet comprising a second conductive layer and disposed proximate to the first dielectric layer, the second sheet comprising a set of second features. The first dielectric layer is disposed between the first conductive layer and the second conductive layer. The first sheet and the second sheet are non-extensible and flexible. The first sheet and the second sheet are movable relative to each other in a first state. The first sheet and the second sheet are jammed with each other in a second state when a voltage is applied between the first conductive layer and the second conductive layer.