Robert C Christensen

US Patent:

7193765, Mar 20, 2007

Filed:

Mar 31, 2005

Appl. No.:

11/097462

Inventors:

Robert R. Christensen - Salt Lake City UT, US
Forrest L. Williams - Sandy UT, US
Allen H. Tanner - Sandy UT, US

Assignee:

Evans & Sutherland Computer Corporation - Salt Lake City UT

International Classification:

G02F 1/01

US Classification:

359279

Abstract:

The invention provides a system and method for reducing laser speckle and interference patterns in a laser projector display when using a laser projector having a spatial light modulator (SLM) with a defined pixel rate. The method can include the operation of polarizing a laser output of a continuous wave laser such that the laser output is s-polarized with respect to a beam combiner. The s-polarized laser output can be divided into a first laser beam and a second laser beam. A phase of the second laser beam can be modulated with an amplitude sufficient to create a phase delay of approximately half a wavelength of the laser output and at a frequency at least twice that of the SLM's pixel rate.

US Patent:

7334902, Feb 26, 2008

Filed:

Mar 28, 2005

Appl. No.:

11/092128

Inventors:

Harry Streid - Salt Lake City UT, US
Robert R. Christensen - Salt Lake City UT, US
Allen H. Tanner - Sandy UT, US

Assignee:

Evans & Sutherland Computer Corporation - Salt Lake City UT

International Classification:

G03B 21/28
G03B 21/56

US Classification:

353 98, 359451

Abstract:

A wide angle display system includes a linear array projector, a curved display surface, and an n-sides scanning mirror. The projector is configured to project an image along an optical axis to the scanning mirror. The scanning mirror continuously rotates about a rotational axis at a speed 1/n the refresh rate, so as to reflect and scan the image onto the display surface.

US Patent:

7400449, Jul 15, 2008

Filed:

Sep 29, 2006

Appl. No.:

11/541154

Inventors:

Robert R. Christensen - Salt Lake City UT, US
Forrest L. Williams - Sandy UT, US
Allen H. Tanner - Sandy UT, US

Assignee:

Evans & Sutherland Computer Corporation - Salt Lake City UT

International Classification:

G02B 5/18
G02B 27/44

US Classification:

359566, 359558

Abstract:

A system and method is disclosed for reducing visibility of image artifacts caused by diffractive elements in a laser projector having a structured diffractive device. At least two diffracted orders of light can be selected from light emitted from the structured diffractive device using a spatial light filter. The polarization of at least one of the selected diffracted orders can be changed with respect to another selected diffracted order. The selected diffracted order can be recombined to form an image having reduced visible image artifacts.

US Patent:

20100183769, Jul 22, 2010

Filed:

Jan 21, 2010

Appl. No.:

12/691630

Inventors:

Robert D. Christensen - Layton UT, US

International Classification:

A23L 1/305
A23L 1/302
A23L 1/304
A23C 9/152
A23C 9/158

US Classification:

426 72, 426656, 426580, 426602, 426 74, 426590, 426311

Abstract:

Colostrum solutions, their formulations and a method of making the solutions are presented. These solutions could be used in situations where the mother is not able to naturally provide colostrum to an infant.

US Patent:

20130078316, Mar 28, 2013

Filed:

Mar 26, 2012

Appl. No.:

13/430594

Inventors:

Robert D. Christensen - Layton UT, US
Edward B. Walker - Ogden UT, US

International Classification:

A61K 33/42

US Classification:

424602

Abstract:

A synthetic endotracheal irrigant for preventing, treating, and reducing infections, including mucosal infections in patients, including infants. A method for producing a formulation of the synthetic endotracheal irrigant with a water content of about 98% (w/w) to about 99.9(w/w) and a total mineral content of less than about 5.0% (w/w), including a sodium content of less than about 2.0% (w/w). The synthetic endotracheal irrigant excludes protein.

US Patent:

52855805, Feb 15, 1994

Filed:

Oct 9, 1992

Appl. No.:

7/958893

Inventors:

Robert J. Christensen - Brigham City UT

International Classification:

B43L 1320

US Classification:

33565

Abstract:

A device for making an arc of a predetermined radius at a square corner of a workpiece includes a positioning member having first and second edge members which are joined together at a right angle so that the positioning member may be seated against the square corner and an arc member extending across a portion of the right angle formed between the first and second edge members. The arc member is planar with the positioning member disposed on and extending from the arc member. The device may also include multiple positioning members and multiple arc members having different arc radii. A method of marking an arc of a predetermined radius at a square corner of a workpiece includes the steps of providing a device that has a positioning member having first and second edge members joined together at a right angle such that the positioning member may be seated against the square corner and an arc member extending across a portion of the right angle formed by the edge members, positioning the device such that the positioning member is in a seated position against the square corner and the arc member is disposed against the surface of the workpiece to be marked; and marking the arc on the surface of the workpiece by holding a marking implement against the arc member and, while moving the marking implement along the arcuate edge, pressing the marking implement against the workpiece to leave a mark.

US Patent:

20200172212, Jun 4, 2020

Filed:

Feb 10, 2020

Appl. No.:

16/786926

Inventors:

- Salt Lake City UT, US
Eric Nofsinger - North Salt Lake UT, US
Robert D. Christensen - Salt Lake City UT, US

International Classification:

B63B 45/02
F21V 31/00
F21V 29/89
F21V 5/04
F21V 17/12
F21V 23/04

Abstract:

A submersible marine lighting apparatus is provided that includes voltage up-conversion and that is configured to intensify emitted light by reducing a transmission angle of the light through one or more techniques including increasing the distance between the light emitter and an optical lens. The submersible marine lighting apparatus includes a circular base, an LED array positioned in a recess in the base, an optical lens, a lens gasket, and a retaining ring. The lens gasket cooperating with the circular base, optical lens and retaining ring to form a waterproof seal between the circular base and the retaining ring. When attached to a watercraft, the interior of the lighting apparatus is sealed from water.

US Patent:

20190278920, Sep 12, 2019

Filed:

May 24, 2019

Appl. No.:

16/421979

Inventors:

- New York NY, US
Alec Wilkins - Salt Lake City UT, US
Robert Christensen - Sandy UT, US

Assignee:

tZERO Group, Inc. - New York NY

International Classification:

G06F 21/60
H04L 9/32
G06F 21/64

Abstract:

Systems and methods described herein generally relate to storing and verifying data. In some embodiments, reference levels are generated according to time intervals, where the first reference level comprises a predetermined number of the time intervals, and where each of the time intervals of the remaining reference levels is comprised of a predetermined number of the time intervals of a previous reference level. Hashes of data can be created at the first reference level by performing a hashing function on the data in a time-sequenced manner. First reference level time interval hashes may be generated by performing the hashing function on the hashes of the data at each of the time intervals of the first reference level. Hashes for remaining reference level time intervals can be generated by performing the hashing function on the hashes of each of the time intervals of the previous reference level.