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David A. Johnson

David A. Johnson, Del Mar, CA US

Patent application numberDescriptionPublished
20090174940CURVED LENSES CONFIGURED TO DECODE THREE-DIMENSIONAL CONTENT - Curved lenses configured to decode three dimensional content and method of fabricating the same. The lenses comprise a polyvinylalcohol polarizer film laminated with triacetate on both sides, wherein the polarizer film has a polarizing efficiency equal to or exceeding 99% and a transmittance percentage equal to or exceeding 35% and a retarder film (e.g., norbornene copolymer resin) laminated on a front surface of the polyvinylalcohol polarizer film laminated with triacetate and aligned to produce a desired circular polarization responsive to specified retardation wavelengths.07-09-2009
20100134884CURVED LENSES CONFIGURED TO DECODE THREE-DIMENSIONAL CONTENT - Curved lenses configured to decode three dimensional content and method of fabricating the same. The lenses comprise a polyvinylalcohol polarizer film or similar type of material laminated with triacetate or similar type material on one or both sides, wherein the polarizer film has a polarizing efficiency equal to or exceeding 99% and a transmittance percentage equal to or exceeding 35% and a retarder film (e.g., norbomene copolymer resin) laminated on a front surface of the polyvinylalcohol polarizer film laminated with triacetate and aligned to produce a desired circular polarization responsive to specified retardation wavelengths. Thermoforming and press polishing techniques may be used to fabricate/curve the blanks into lenses. The lenses (optical elements) may be used in an injection molding process to add thickness.06-03-2010
20110085237CURVED LENSES CONFIGURED TO DECODE THREE-DIMENSIONAL CONTENT ON TELEVISION AND COMPUTER SCREENS - Curved lenses configured to decode three dimensional content and method of fabricating the same. The lenses decode three-dimensional content displayed on televisions or computer monitors. Sheets from which the lenses are cut have either (i) a polarizing axis of 0 degrees relative to horizontal and one sheet has a retarder axis at −45 degrees relative to horizontal and the other sheet has a retarder axis of +45 degrees relative to horizontal; (ii) a polarizing axis of −45 degrees relative to horizontal and one sheet has a retarder axis at 0 degrees relative to horizontal and the other sheet has a retarder axis of 90 degrees relative to horizontal; or (iii) a polarizing axis of +45 degrees relative to horizontal and one sheet has a retarder axis at 0 degrees relative to horizontal and the other sheet has a retarder axis of 90 degrees relative to horizontal.04-14-2011
20110090454CURVED CORRECTIVE LENSES CONFIGURED TO DECODE THREE-DIMENSIONAL CONTENT - Curved corrective lens configured to decode three dimensional content. The corrective lens may include a wafer formed of a high efficiency polarizer material layer over a lamination layer over an adhesion layer over a retardation layer, and a lens material to which the wafer is integrated and into which a prescription is ground. Photochromic materials may also be used to provide a self-darkening feature.04-21-2011

Patent applications by David A. Johnson, Del Mar, CA US

David A. Johnson, Simonton, TX US

Patent application numberDescriptionPublished
20100226209Fish Finder - A method, system, and apparatus are provided for focused ultrasonic acoustic imaging of objects within a body of water. A plurality of echo soundings are collected, the soundings produced by an ultrasonic transmitter and detected by an ultrasonic receiver. Spatial location information of the transmitter and receiver is collected and associated with each collected echo sounding. A focused signal spatial location is selected. One or more of the collected echo soundings are selected. An echo signal from each selected echo sounding is selected. The echo signal selection is determined by a calculation of which echo signal from the selected echo sounding corresponds to a focused signal occurring at the selected focused signal spatial location. The calculation is based on the selected focused signal spatial location and on the collected spatial information associated with the selected echo sounding. The selected echo signals are combined, whereby a focused echo signal is formed. The focused echo signals are graphed based on their respective selected focused signal spatial locations, whereby a focused image is produced.09-09-2010

David A. Johnson, Wayzata, MN US

Patent application numberDescriptionPublished
20080268666APPARATUS FOR PROVIDING CONTROLLED IMPEDANCE IN AN ELECTRICAL CONTACT - An apparatus for providing a controlled impedance directly to predetermined contact elements within a socket, thereby reducing the “distorting” nature of the electrical interconnection system. In an illustrative embodiment of the present invention, predetermined contacts of a socket may have a resistance, inductance, capacitance, or a combination thereof incorporated therein. In another illustrative embodiment, at least one active element(s) may also be incorporated into predefined contacts. In this manner, predefined contacts may “process” the corresponding signal in a predetermined manner, defined by the circuitry incorporated on the contact itself. Illustrative functions that may be performed include, but are not limited to, amplifying, analog-to-digital converting, digital-to-analog converting, predefined logic functions, or any other function that may be performed via a combination of active and/or passive elements including a microprocessor function.10-30-2008
20100136840APPARATUS FOR PROVIDING CONTROLLED IMPEDANCE IN AN ELECTRICAL CONTACT - An apparatus for providing a controlled impedance directly to predetermined contact elements within a socket, thereby reducing the “distorting” nature of the electrical interconnection system. In an illustrative embodiment of the present invention, predetermined contacts of a socket may have a resistance, inductance, capacitance, or a combination thereof incorporated therein. In another illustrative embodiment, at least one active element(s) may also be incorporated into predefined contacts. In this manner, predefined contacts may “process” the corresponding signal in a predetermined manner, defined by the circuitry incorporated on the contact itself. Illustrative functions that may be performed include, but are not limited to, amplifying, analog-to-digital converting, digital-to-analog converting, predefined logic functions, or any other function that may be performed via a combination of active and/or passive elements including a microprocessor function.06-03-2010

Patent applications by David A. Johnson, Wayzata, MN US

David A. Johnson, Hamilton, MT US

Patent application numberDescriptionPublished
20080227729PROPHYLACTIC AND THERAPEUTIC TREATMENT OF INFECTIOUS AND OTHER DISEASES WITH IMMUNOEFFECTOR COMPOUNDS - Methods and compositions for treating or ameliorating diseases and other conditions, such as infectious diseases, autoimmune diseases and allergies are provided. The methods employ cyclic AGPs for selectively stimulating immune responses in animals and plants.09-18-2008
20110178034PROPHYLACTIC AND THERAPEUTIC TREATMENT OF INFECTIOUS AND OTHER DISEASES WITH MONO- AND DISACCHARIDE-BASED COMPOUNDS - Methods and compositions for treating or ameliorating diseases and other conditions, such as infectious diseases, autoimmune diseases and allergies are provided. The methods employ mono- and disaccharide-based compounds for selectively stimulating immune responses in animals and plants.07-21-2011
20110257113Method for Inducing a Trif-Bias - The use of a selected aminoalkyl glusoaminide 4-phosphate (AGP) CRX-547 to induce a TRIF biased response in a human system, which results in reduced levels of MyD88-dependent cytokines relative to the MyD88-dependent cytokines induced by its diastereomer AGP CRX-527.10-20-2011
20110282061Lipidated Imidazoquinoline Derivatives - The compounds of the subject invention are adjuvant molecules that comprise a imidazoquinoline molecule covalently linked to a phospho- or phosphonolipid group. The compounds of the invention have been shown to be inducers of interferon-a, IL-12 and other immunostimulatory cytokines and possess an improved activity profile in comparison to known cytokine inducers when used as adjuvants for vaccine antigens.11-17-2011

Patent applications by David A. Johnson, Hamilton, MT US

David A. Johnson, Charlotte, NC US

Patent application numberDescriptionPublished
20120029752Robotic Mower Stuck Detection System - A robotic mower stuck detection system includes a boundary sensor on the robotic mower that can detect when the robotic mower reaches a boundary wire, an accelerometer on the robotic mower that can detect when the robotic mower encounters an obstacle; and a vehicle control unit on the robotic mower having a timer that is reset each time the robotic mower reaches a boundary wire or encounters an obstacle; and executes a stuck vehicle task if the timer exceeds a specified maximum time without being reset.02-02-2012
20120029753ROBOTIC MOWER HOME FINDING SYSTEM - A robotic mower home finding system includes a charging station connected to an outer boundary wire loop, and a vehicle control unit on the robotic mower that directs a traction drive system to drive the robotic mower along a path offset a specified distance from an outer boundary wire loop toward the charging station. The vehicle control unit changes the specified distance randomly or incrementally so that the robotic mower does not take the same path to the charging station each time.02-02-2012
20120029755ROBOTIC MOWER AREA COVERAGE SYSTEM - A robotic mower area coverage system includes a load sensor on the robotic mower signaling load on a cutting blade motor, a boundary sensor on the robotic mower indicating the distance from the sensor to a boundary wire, a timer on the robotic mower indicating when the robotic mower last used a specified boundary coverage, and a vehicle control unit on the robotic mower selecting the type of area coverage based on input from the load sensor, the boundary sensor and the timer, and commanding a pair of traction drive motors to drive the robotic mower using the selected type of area coverage.02-02-2012
20120029756ROBOTIC MOWER BOUNDARY COVERAGE SYSTEM - A robotic mower boundary coverage system includes a vehicle control unit on the robotic mower commanding a traction drive system to drive the robotic mower at a specified yaw angle with respect to a boundary wire, and a boundary sensor on the robotic mower signaling the distance between the boundary wire and the vehicle control unit. The vehicle control unit alternates commands to direct the traction drive system toward and away from the boundary wire based on the distance of the robotic mower to the boundary wire.02-02-2012