Patents by Inventor Juan F. Velazquez
Juan F. Velazquez 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).
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Patent number: 6767320Abstract: An endoscope assembly includes a housing having an outwardly extending tube with the free end adapted for insertion into a body cavity. A laser is contained within the housing which emits an output beam through the free end of the tube. A light sensor detects light in a predetermined color range which impinges upon the free end of the tube and generates an output signal representative thereof. A circuit disables the laser in response to the output signal from the light sensor.Type: GrantFiled: August 13, 2002Date of Patent: July 27, 2004Assignee: Inner Vision Imaging, L.L.C.Inventors: Richard A. Farkas, Terrance R. Boyd, Juan F. Velazquez
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Publication number: 20040034277Abstract: An endoscope assembly includes a housing having an outwardly extending tube with the free end adapted for insertion into a body cavity. A laser is contained within the housing which emits an output beam through the free end of the tube. A light sensor detects light in a predetermined color range which impinges upon the free end of the tube and generates an output signal representative thereof. A circuit disables the laser in response to the output signal from the light sensor.Type: ApplicationFiled: August 13, 2002Publication date: February 19, 2004Applicant: Inner Vision Imaging, L.L.C.Inventors: Richard A. Farkas, Terrance R. Boyd, Juan F. Velazquez
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Patent number: 5191585Abstract: A computer networking method is disclosed, including methods of building packets of information, transmitting packets of information, and processing information received from another device in a network, wherein when data packets are built, they are initially built only with an address appended to the data in the packet but once a threshold level of failed transmission is encountered, a second type of information packet is built having error correcting means built therein.Type: GrantFiled: March 2, 1989Date of Patent: March 2, 1993Assignee: Secom Information Products CompanyInventor: Juan F. Velazquez
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Patent number: 5057829Abstract: An adjustment free computer networking apparatus is shown which isolates the transmitter portion thereof from the power line when it is not transmitting, has a carrier isolator provided within its power supply to prevent it from shorting out its own signal, and which has a crystal oscillator to maintain the frequency of the signals being used to transmit data.Type: GrantFiled: March 2, 1989Date of Patent: October 15, 1991Assignee: Secom Information Products CompanyInventor: Juan F. Velazquez
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Patent number: 4498129Abstract: Analog servo-positioning signals transduced from a recorded member, such as embedded servo signals recorded on a disc memory or the like, which are to be compared to one another in order to derive an error signal indicative of off-track position deviations, are normalized for accurate responsive positioning changes by use of an analog-to-digital converter referenced by both a positive and a negative summation of the two analog signals and supplied with the individual analog signals as inputs, such that the digitalized output comprises a pair of digital signals, the first representative of the quotient of the first analog signal divided by the summation of the two analog signals, and the second representative of the second analog signal divided by the same summation of analog signals.Type: GrantFiled: July 2, 1981Date of Patent: February 5, 1985Assignee: Irwin Magnetic Systems, Inc.Inventor: Juan F. Velazquez
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Patent number: 4464634Abstract: An audio power amplifier includes an input amplifier stage and an output power amplifier stage. The output power amplifier stage comprises a p-channel field effect transistor and an n-channel field effect transistor having interconnected drain electrodes forming an output signal terminal. A driver circuit is provided for driving the p-channel and n-channel field effect transistors in a transconductance mode of operation in which the output current through the field effect transistors is directly proportional to the input voltage applied to the output amplifier stage. A first feedback path is provided between the output power amplifier stage and the input amplifier stage. A second feedback path is formed between the output and input of the input amplifier stage.Type: GrantFiled: June 10, 1982Date of Patent: August 7, 1984Assignee: VSP Labs, Inc.Inventor: Juan F. Velazquez
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Patent number: 4462053Abstract: A method for positioning and maintaining a disc head over a desired track centerline on a disc rotatably carried on a disc drive. The distance between the current position of the disc head and the desired track centerline is monitored, and a signal generally proportional to that distance is applied to the disc head moving mechanism to cause the disc head to move toward the track centerline. The control signal is clipped if it exceeds predetermined maximum and minimum values.Type: GrantFiled: July 2, 1981Date of Patent: July 24, 1984Assignee: Irwin International, Inc.Inventors: Francis Lum, Bruce Graham, Samuel N. Irwin, Juan F. Velazquez
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Patent number: 4311399Abstract: The specification discloses a method and apparatus for setting and varying margins, line spacing and printing direction of a data printing machine by a machine user before and during printing by use of a keyboard with push-button control which is coupled to a digital controller to input information about the actual and the desired location of a print head relative to a printing surface, in response to which the controller outputs signals which control relative motion of the print head and indexes its relative position, from the actual to the desired direction and location.Type: GrantFiled: July 25, 1979Date of Patent: January 19, 1982Assignee: Sycor, Inc.Inventors: William Wegryn, Juan F. Velazquez
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Patent number: 4305674Abstract: A rotary encoder is coupled to the drive for a printing head to detect and encode movement of the drive and produce signals therefrom which are used to control the direction and positioning of the printing head. A rotating disc-like wheel in the encoder has a plurality of peripheral window openings which act in conjunction with a light source and detector to produce a signal train from which the movement and instantaneous location of the printing head is determined.Type: GrantFiled: August 22, 1979Date of Patent: December 15, 1981Assignee: Sycor, Inc.Inventor: Juan F. Velazquez
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Patent number: 4195938Abstract: A rotary encoder is coupled to the drive for a printing head to detect and encode movement of the drive and produce signals therefrom which are used to control the direction and positioning of the printing head. A rotating disc-like wheel in the encoder has a plurality of peripheral window openings which act in conjunction with a light source and detector to produce a signal train from which the movement and instantaneous location of the printing head is determined.Type: GrantFiled: February 9, 1977Date of Patent: April 1, 1980Assignee: Sycor, Inc.Inventor: Juan F. Velazquez
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Patent number: 4046244Abstract: A dot matrix impact print head uses a combination of cooperating forces produced by a deflected spring and dual electromagnetic fields to increase the striking force of a printing wire or needle element without adversely affecting operating frequency capabilities.Type: GrantFiled: August 6, 1975Date of Patent: September 6, 1977Assignee: Sycor, Inc.Inventor: Juan F. Velazquez
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Patent number: D270055Type: GrantFiled: September 8, 1980Date of Patent: August 9, 1983Assignee: Irwin International, Inc.Inventors: Samuel N. Irwin, Otto R. Butsch, Francis Lum, Juan F. Velazquez
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Patent number: D270348Type: GrantFiled: September 8, 1980Date of Patent: August 30, 1983Assignee: Irwin International, Inc.Inventors: Samuel N. Irwin, Otto R. Butsch, Francis Lum, Juan F. Velazquez