1
Joseph Grayzel: Single-chamber, multi-section balloon for cardiac assistance. Datascope Corporation, Kenyon & Kenyon Reilly Carr & Chapin, February 24, 1976: US03939820 (189 worldwide citation)

A device to be inserted in a blood vessel in order to aid the pumping of blood in only one direction within that vessel which comprises a gas inflatable and deflatable chamber mounted on support means and divided into an occluding section and a pumping section in direct communication with each other ...


2
Lawrence E Curtiss: Resectoscope and electrode therefor. American Cystoscope Makers, John A Howson Esq, February 24, 1976: US03939839 (162 worldwide citation)

The disclosed apparatus includes a resectoscope with a novel working element stem, a novel cutting electrode for use with the stem and novel electrical features including a dielectric moving block element for reciprocating the electrode. The stem portion of the working element has a telescope channe ...


3
Roger J Withrington: Optical display systems utilizing holographic lenses. Hughes Aircraft Company, W H MacAllister, Walter J Adam, February 24, 1976: US03940204 (158 worldwide citation)

This invention is applicable to display systems, such as in a helmet mounted display or a head-up display, utilizing a holographic lens operating at a relatively large off-axis angle in order to perform the dual function of a combiner glass and an eyepiece. The holographic lens is used in conjunctio ...


4
George D Margolin: Expandable keyboard for electronic pocket calculators and the like. February 24, 1976: US03940758 (136 worldwide citation)

An expandable keyboard for a pocket-type calculator is made in modular form to electrically interconnect to form a keyboard much larger than that of a familiar pocket calculator. The keyboard portions are hinged together normally forming a stack, which occupies along with the display and the electro ...


5
John R Hutton: Apparatus for manufacturing rough faced bricks. Columbia Machine, Kolisch Hartwell Dickinson & Stuart, February 24, 1976: US03940229 (127 worldwide citation)

Apparatus for manufacturing a brick having a roughened side surface including interconnected, upright, side plates defining a mold cavity having generally the shape of a brick to be formed. A bottom plate is shiftable vertically from a position against the lower edges of the side plates to form a bo ...


6
Wendell D Creps: Engine with dual sensor closed loop fuel control. General Motors Corporation, Robert M Sigler, February 24, 1976: US03939654 (116 worldwide citation)

In a closed loop fuel control system for an internal combustion engine having a catalytic converter in its exhaust system, a first zirconia sensor in the exhaust system upstream from the catalytic converter generates a signal indicative of air-fuel ratio in gases before catalytic treatment, a second ...


7
Stanley Joseph Gross: Radioimmune method of assaying quantitatively for a hapten. Biological Developments, Ryder McAulay Fields Fisher & Goldstein, February 24, 1976: US03940475 (108 worldwide citation)

A radioimmune method of assaying quantitatively for a hapten comprising contacting an aqueous sample containing the hapten under assay, a known quantity of a radioactively labeled marker which incorporates a hapten homologous to the hapten under assay, and an insolubilized antibody specific for the ...


8
Wendell C Overhults: Cross-linked cyanoacrylate adhesive compositions. Johnson & Johnson, February 24, 1976: US03940362 (104 worldwide citation)

New polymerizable adhesive compositions comprising a monomeric ester of .alpha.-cyanoacrylic acid and a difunctional monomeric cross-linking agent which is a diester of acrylic or methacrylic acid and an alcohol having at least two esterifiable hydroxyl group, are found to develop increased cohesive ...


9
Curtis D Kissinger, Bradford Howland: Fiber optic displacement measuring apparatus. Mechanical Technology Incorporated, Joseph V Claeys, February 24, 1976: US03940608 (102 worldwide citation)

Fiber optic displacement/position measuring apparatus having increased working distance and measuring range capability is provided by combining an optical extending sensing head in fixed relationship with the common end of a bifurcated fiber optic bundle. The sensing head includes a lens system whic ...


10
Adrian Paul Brokaw: Digital-to-analog converter with current source transistors operated accurately at different current densities. Analog Devices, Parmelee Johnson & Bollinger, February 24, 1976: US03940760 (97 worldwide citation)

A digital-to-analog converter of the type formed with a plurality of current source transistors arranged to carry different levels of current according to a predetermined weighting pattern, e.g., a binary weighting pattern. In the converter, a plurality of identically sized current source transistor ...