Patents by Inventor Albert John Hofeldt

Albert John Hofeldt has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9560960
    Abstract: A machine and method for balancing across the brain's fusion bridge rivalrous stimuli of image pairs having diametrically opposed brightness and means of adjusting the rivalrous balance to measure the depth of a vision defect.
    Type: Grant
    Filed: October 18, 2012
    Date of Patent: February 7, 2017
    Inventor: Albert John Hofeldt
  • Publication number: 20150256817
    Abstract: My invention provides an adaptor housing two cameras for stereoscopic real-time digital viewing and image capture of (1) the immediate environment viewed by the observer, (2) the images viewed through the optical system of a microscope to which my invention is attached, and (3) the images illuminated by an attached slit beam light and viewed by the observer through parfocal right and left compound microscopes or magnifying lenses affixed to my adaptor. By viewing the binocular digital displays the observer is seeing in real-time the focused target and has the option to photograph anything of interest by a right or left digital imaging device or both at any time. Simultaneously image capture of viewable field with both imaging devices produce stereoscopic image format. Importantly, the captured images are an exactly copy of the observer's view because he is observing the images on the digital displays, in real-time, in focus and in the observed lighting parameters.
    Type: Application
    Filed: May 6, 2015
    Publication date: September 10, 2015
    Inventor: Albert John Hofeldt
  • Patent number: 9089257
    Abstract: My invention is an automated self-testing method utilizing binary choice, which is applicable to monocular and binocular eye tests and can be administered on computer, cellular phones, and other electronic devices. Binary choice of match or no match, yes or no, present or absence provides simple means of automated testing by stepwise progression through staircase algorisms. Necessary devices have been introduced in order to fully utilize the power of binary choice self testing, such as, (1) printed display overlays for testing fine visual acuity at near, (2) bright illuminator of printed overlays to allow automated potential vision testing, (3) the use of complementary color lenses and color test isopters for binocular perimetry.
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: July 28, 2015
    Inventor: Albert John Hofeldt
  • Patent number: 9017222
    Abstract: A machine for testing and training jumping and reaching ability for use by athlete or by other people for recreation is disclosed having the following attributes: centrally balanced, light weight and portable, usable indoors or outdoors, resets to starting position after each use, signals contact by flashing light or sound, and has means of measuring the height reached by the extended hand.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: April 28, 2015
    Inventors: Robert Herman Hofeldt, Albert John Hofeldt
  • Publication number: 20150022782
    Abstract: My invention is an automated self-testing method utilizing binary choice, which is applicable to monocular and binocular eye tests and can be administered on computer, cellular phones, and other electronic devices. Binary choice of match or no match, yes or no, present or absence provides simple means of automated testing by stepwise progression through staircase algorisms. Necessary devices have been introduced in order to fully utilize the power of binary choice self testing, such as, (1) printed display overlays for testing fine visual acuity at near, (2) bright illuminator of printed overlays to allow automated potential vision testing, (3) the use of complementary color lenses and color test isopters for binocular perimetry.
    Type: Application
    Filed: July 18, 2013
    Publication date: January 22, 2015
    Inventor: ALBERT JOHN HOFELDT
  • Patent number: 8464364
    Abstract: A pocketed device for housing cushioning located on the palm of a glove that has a gate which allows the padding material to be removed and replaced with the same or different material.
    Type: Grant
    Filed: November 7, 2011
    Date of Patent: June 18, 2013
    Inventor: Albert John Hofeldt
  • Publication number: 20130100400
    Abstract: A machine and method for balancing across the brain's fusion bridge rivalrous stimuli of image pairs having diametrically opposed brightness and means of adjusting the rivalrous balance to measure the depth of a vision defect.
    Type: Application
    Filed: October 18, 2012
    Publication date: April 25, 2013
    Inventor: Albert John Hofeldt
  • Publication number: 20120192971
    Abstract: A low-pressure valve that inserts into in a drainage system having has an inflatable balloon which fixates the value housing to a pre-existing drainage pipe to prevent backflow when the hydrostatic pressure is greater distal to the valve than proximal to the valve.
    Type: Application
    Filed: January 28, 2011
    Publication date: August 2, 2012
    Inventors: Albert John Hofeldt, Mark Gaspich, Caroline Grace Gaspich
  • Publication number: 20120178587
    Abstract: A machine for testing and training jumping and reaching ability for use by athlete or by other people for recreation is disclosed having the following attributes: centrally balanced, light weight and portable, usable indoors or outdoors, resets to starting position after each use, signals contact by flashing light or sound, and has means of measuring the height reached by the extended hand.
    Type: Application
    Filed: January 10, 2011
    Publication date: July 12, 2012
    Inventors: Robert Herman Hofeldt, Albert John Hofeldt
  • Publication number: 20120117704
    Abstract: A pocketed device for housing cushioning located on the palm of a glove that has a gate which allows the padding material to be removed and replaced with the same or different material.
    Type: Application
    Filed: November 7, 2011
    Publication date: May 17, 2012
    Inventor: Albert John Hofeldt
  • Patent number: 8038297
    Abstract: A vision-testing device is disclosed that measures glare, macular photostress, and the blue-field entopic phenomenon. Utilizing a mirror, the effective brightness of a small energy efficient light bulb is increased which allows a compact assembly. One embodiment places lights in the line of vision to closely duplicate the glare experience from on coming automobile headlights. The invention provides for testing glare under diffuse and focal lighting conditions which closely mimic environmental lighting conditions.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: October 18, 2011
    Inventor: Albert John Hofeldt
  • Patent number: 7857450
    Abstract: A vision testing device for measuring single or multiple visual functions consisting of an internally illuminated hand-held instrument, vision charts, vision correcting and occluding elements, a testing frame for holding combined vision correcting and blocking elements, and modular accessories.
    Type: Grant
    Filed: February 4, 2008
    Date of Patent: December 28, 2010
    Inventor: Albert John Hofeldt
  • Publication number: 20090236346
    Abstract: An article of manufacture for storing and dispensing perishable foods that prolongs product life and encourages portion control by dividing bulk storage into multiple sealed compartments with each compartment having an easily removable closure that prevents exposure to the environment.
    Type: Application
    Filed: March 22, 2008
    Publication date: September 24, 2009
    Inventors: Albert John Hofeldt, Richard Stern
  • Patent number: 7290878
    Abstract: A process for formatting rivalrous fusible images having similarly shaped stimuli of similar binocular luminance and having other similarly shaped stimuli of different binocular luminance, which metamorphose during perception into identifiable shapes that distinguish fusion from suppression. The preferred embodiment is an invertible stereoscope for viewing rivalrous images, non-rivalrous images, and stereograms, having adjustable eyepieces, lighting control of front and rear chambers, and lighting control of right and left sides. In a further preferred embodiment, rivalrous stimuli in a complementary color scheme are viewed on printed material or on a computer screen through lenses of complementary colors. Neutral density filter placement that asymmetrically attenuates light to the eyes for detection of sub-threshold afferent defects is disclosed.
    Type: Grant
    Filed: October 15, 2003
    Date of Patent: November 6, 2007
    Inventor: Albert John Hofeldt
  • Patent number: 6962432
    Abstract: My invention is a mixer and dispenser having a dispensing top with an outflow channel, an air vent, and an air vent valve that adjusts the vacuum inside the dispenser; a rotor attached to a battery powered motor; and two switches, one for operating automatically upon pouring and the other manually activated. The vacuum system controls the flow rate during pouring and the constant mixing disperses the ingredients so that the samples dispensed are representative of the original mixture.
    Type: Grant
    Filed: February 10, 2003
    Date of Patent: November 8, 2005
    Assignees: HP Intellectual Corp.
    Inventor: Albert John Hofeldt
  • Publication number: 20040155063
    Abstract: My invention is a mixer and dispenser having a dispensing top with an outflow channel, an air vent, and an air vent valve that adjusts the vacuum inside the dispenser; a rotor attached to a battery powered motor; and two switches, one for operating automatically upon pouring and the other manually activated. The vacuum system controls the flow rate during pouring and the constant mixing disperses the ingredients so that the samples dispensed are representative of the original mixture.
    Type: Application
    Filed: February 10, 2003
    Publication date: August 12, 2004
    Inventor: Albert John Hofeldt
  • Patent number: 6675447
    Abstract: An apparatus with no moving parts that enables the adjustment of the length and tautness of a serpentine article simply by sliding the apparatus. A self-locking and adjustable apparatus is described that consists of a body, an angled passage through the body for passing and gripping the serpentine article, and an anchoring channel for the attachment of one end of the serpentine article to form a loop in the serpentine article. The self-locking and adjustable apparatus can be used alone to apply circumferential force or with fasteners to apply linear force.
    Type: Grant
    Filed: March 10, 2003
    Date of Patent: January 13, 2004
    Inventor: Albert John Hofeldt