David Douglas Bohn
Engineers at Collindale Dr, Fort Collins, CO

5934635, Aug 10, 1999

Jul 22, 1998

9/119771

David D. Bohn - Fort Collins CO

A47F 508

2482319

A self-adjusting rock climbing anchor device includes at least one variable-length compression arm, at least one fixed-length load arm, a pivot element pivotally connecting the compression and load arms to one another, and at least one fixed-length follower cable. The follower cable interconnects the compression and load arms at intermediate locations thereon so as to form at least one four-bar linkage defined by the pivot element, the compression arm, the load arm and the follower cable, the follower cable. The movement of the compression and load arms between an unwedged and wedged condition provides for self-adjustment of the compression and load arms within the cleft and enables use of the compression and load arms in clefts of different sizes. The device further includes at least one spring which biases the compression arm toward a maximum length and thereby preloads the device to resist forces directed on the device from outside of a plane defined by the compression and load arms.

5459611, Oct 17, 1995

Aug 18, 1993

8/108359

David D. Bohn - Fort Collins CO
Jesse M. Gerrard - Loveland CO

Hewlett-Packard Company - Palo Alto CA

G02B 2710

359618

A beam splitter/path length compensator assembly for use in a color imaging assembly, comprising a beam splitter for splitting a polychromatic imaging light beam into a plurality of color component beams, and an integrally formed, transparent path length compensator device for differentially adjusting the focus distances of the color component beams. The beam splitter is encased within the path length compensator device. A color imaging assembly utilizing the beam splitter/path length compensator assembly for forming spatially separated, color component images of an object on a unitary image plane is also disclosed. A method for producing a beam splitter/path length compensator assembly is also disclosed. An optical assembly utilizing a beam combiner/path length compensator assembly for spatially and spectrally combining a plurality of color component optical beams into a combined optical beam having a unitary optical axis is also disclosed.

6229297, May 8, 2001

Jun 30, 1999

9/345188

David D. Bohn - Fort Collins CO

Hewlett-Packard Company - Palo Alto CA

G01P 348

324160

A position sensing device is disclosed wherein the positioning sensing device may determine the velocity and position of an object relative to a surface as the object is moved relative to the surface. The positioning sensing device may comprise two depth measurement devices that are mounted to the object on an axis that is substantially parallel to the direction of movement between object and the surface. The depth measurement devices are spaced a predetermined distance from each other. The depth measurement devices measure the contours of the surface as the object is moved relative to the surface and may output data representative of the surface contour to a processor. Accordingly, the processor receives two data signals that are out of phase wherein the phase shift is proportional to the relative velocity between the object and the surface. The processor may then perform an analysis on the data signals to determine the velocity of the object relative to the surface. Likewise, the processor may also determine the displacement of the object relative to the surface during a time interval.

2013016, Jun 27, 2013

Dec 23, 2011

13/336895

David D. Bohn - Fort Collins CO, US

G02B 27/01, B32B 37/14, B32B 37/02

359630, 156 60, 156242

In embodiments of reflective array waveguide, a reflective array waveguide includes clear waveguide panels for see-through viewing of an environment viewed through the reflective array waveguide. The reflective array waveguide also includes reflecting waveguide panels to reflect a virtual image that is generated to appear as part of the environment. Each of the reflecting waveguide panels have a partially reflective mirror coating deposited on opposing sides, and the reflecting waveguide panels are alternated in the reflective array waveguide with the clear waveguide panels. The alternating clear and reflecting waveguide panels are angled for augmented reality imaging of the reflected virtual image as part of the environment that is viewed through the reflective array waveguide.

2013025, Sep 26, 2013

Mar 21, 2012

13/426379

Steve Robbins - Bellevue WA, US
David D. Bohn - Fort Collins CO, US

G02B 27/01

359633

A near-eye display system includes an image former and a waveguide. The image former is configured to form a display image and to release the display image through a first exit pupil. The waveguide presents a back surface that faces the wearer's eye, and a front surface opposite the back surface. The waveguide is substantially transparent to external imagery received normal to the front surface, and is configured to receive the display image from the image former and to release the display image through a second exit pupil, which is larger than the first exit pupil.

2012016, Jun 28, 2012

Dec 23, 2010

12/977852

David D. Bohn - Fort Collins CO, US
Rod G. Fleck - Bellevue WA, US
Derek Leslie Knee - Fort Collins CO, US

MICROSOFT CORPORATION - Redmond WA

F21V 7/22

362608

In embodiments of a transparent display backlight assembly, a backlight panel is operable as a transparent panel, and a light source generates light that the backlight panel directs from the light source to illuminate a display panel of a display device. Light refraction features refract and scatter the light, where the light refraction features are spaced for approximate transparency of the backlight panel and to illuminate the display panel. An active diffuser can be implemented as an additional transparent panel and operable for activation to diffuse the light from the backlight panel that illuminates the display panel.

6184515, Feb 6, 2001

Feb 5, 1999

9/245473

David D. Bohn - Fort Collins CO

Hewlett-Packard Company - Palo Alto CA

H01L 2700, H04N 1024

2502081

Expandable scanner apparatus may comprise a main body with a detector mounted therein. A contact head mounted to the main body can be moved toward and away from the main body between a retracted position and an extended position. An optical system operatively associated with the main body and the contact head focuses on the detector image light from an object being scanned when the contact head is in the extended position.

7061471, Jun 13, 2006

Jul 31, 2003

10/630845

David D. Bohn - Fort Collins CO, US

Microsoft Corporation - Redmond WA

G09G 5/00

345163, 345169, 345684

A computer input device includes a scrolling apparatus that includes a rotatable scroll wheel and a scroll wheel locking device. The scroll wheel locking device is activated when the document being scrolled reaches its end. When activated, the scroll wheel locking device prevents further rotation of the scroll wheel in the direction that would normally be past the end of the document, but permits rotation of the scroll wheel in the opposite direction towards the other end of the document. The scroll wheel locking device includes lockable wheel rotatable with and spaced from the scroll wheel. The lockable wheel includes angularly spaced pins. A tri-position lever includes locking elements engagable with the teeth to cause unidirectional locking.

2009010, Apr 23, 2009

Oct 22, 2007

11/876092

David Bohn - Fort Collins CO, US
Mark DePue - Issaquah WA, US

MICROSOFT CORPORATION - Redmond WA

G06F 3/033

345166

An optical mouse configured to track motion on a broad range of surfaces is disclosed. In one embodiment, an optical mouse includes a light source configured to emit light having a wavelength in or near a blue region of a visible light spectrum, an image sensor positioned relative to the light source such that light from a specular portion of a distribution of light reflected by the tracking surface is detected by the image sensor, and a controller configured to receive image data from the image sensor and to identify a tracking feature in the image data.