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Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 5774565 | Electronic cancellation of ambient noise in telephone headset Noise reducing circuits for electronic receiving instruments, such as telephone receivers in headsets or handsets that are used in noisy locations, provide compensation of the set's receiver unit-to-error microphone transfer function to enhance the noise ... | 06/30/1998 |
| 5629789 | Passive optical repeater bypass for optical fiber systems A passive fiber optic repeater bypass is provided which brings fault tolerance to repeatered fiber optic transmission systems. A fiber optic bypass provides an alternate signal path around failed repeaters. The bypass optical attenuation is set to ensure ... | 05/13/1997 |
| 5619719 | Reduced inter-module circuit path crossovers on circuit boards mounting plural multi-chip modules, through rearranging the north-south-east-west interconnection interfaces of a given module and through selective rotation of each module The number of circuit path crossover points on boards mounting plural connected multichip modules is substantially reduced over the number that would otherwise be required. For 4-sided modules and boards, the modules are arranged on the board in such a wa... | 04/08/1997 |
| 5519788 | Alphanumeric image segmentation scheme A process for creating segments out of an arbitrary string of handwritten alphanumeric script is described, in which the contours of the image are defined by the path a ball or pointer follows when allowed to roll from the top and bottom of an image, down... | 05/21/1996 |
| 5519669 | Acoustically monitored site surveillance and security system for ATM machines and other facilities Acoustic surveillance of objects and human traffic in a spatial zone of a financial transaction device is used to detect movement within the zone. Several specific types of detected movement defined as abnormal trigger an alert to a remote monitoring stat... | 05/21/1996 |
| 5493165 | Force generator for electrostrictive actuators This disclosure describes a method for producing high-performance layered-element electrostrictive or piezoelectric actuators, and the resulting product. The process calls for steps that minimize decreases of the stack stiffness which usually characterize... | 02/20/1996 |
| 5491747 | Noise-cancelling telephone handset A radio or telephone handset configured with the usual transmitter and receiver ends and connecting handle is designed to have physical characteristics well adapted in its acoustic characteristics to complement noise cancellation circuitry. The receiver s... | 02/13/1996 |
| 5487117 | Graphical system for automated segmentation and recognition for image recognition systems Apparatus and processes are described for the automatic recognition of alphanumeric images. A set of cuts are made to the image which include incorrect segmentations. The resulting "cells" comprising in their totality the created segments of the image are... | 01/23/1996 |
| 5462389 | Undersea cable burial plowshare and sled apparatus This disclosure describes a physical design for an ocean floor trenching tool. The tool consists of a replaceable forward-extending plowguard and detachable hardened plow tips. Surfaces forming the tool's mouth around the plowguard cause the tool to penet... | 10/31/1995 |
| 5462358 | Selectively extracting infrared radiation from bioler interior to determine the temperature of individual boiler tubes Surface temperature measurements of the tubes of operating power boilers are facilitated by using ganged and preferably scannable hollow-core sapphire probes to capture infrared radiation emanating from discrete tube surface areas. By selectively overlapp... | 10/31/1995 |
| 5420754 | Stacked board assembly for computing machines, including routing boards A system is described for arraying multi-device processing nodes in a 3-dimensional computing architecture and for flexibly connecting their ports. The topology of each processing node is of a fixed and constant physical geometry. The nodes may comprise a... | 05/30/1995 |
| 5404123 | Modular transformer structure providing enhanced leakage inductance and winding isolation A transformer structure of modular parts comprises a bobbin for supporting the primary winding, and one or more sets of end pieces sized to successively fit one over another in a nesting arrangement. The end piece flanges provide part of the secondary win... | 04/04/1995 |
| 5325438 | Active noise-cancellation system for automotive mufflers In an active control noise-cancelling muffler system, a substantially complete acoustic and mechanical decoupling of the noise-cancelling signal pipe from the gas exhaust pipe is achieved. The noise-cancelling signal delivery pipe is physically isolated a... | 06/28/1994 |
