1
John J Hayes: Parental control for CATV converters. RCA Corporation, Paul J Rasmussen, Peter M Emanuel, Richard G Coalter, January 5, 1988: US04718107 (353 worldwide citation)

A controller in a CATV converter provides three operating modes comprising: (1) a family viewing mode in which conversion of selected channels is blocked; (2) an enter access code mode for selecting the channels to be blocked from family viewing; and (3) a parental control mode in which all channels ...


2
Bernard J Eastlund, Kenneth J Schmitt, Ronald M Bass, John M Harrison: Method and system for introducing electric current into a well. Production Technologies International, Vinson & Elkins, January 5, 1988: US04716960 (310 worldwide citation)

An invention for supplying power to a well. In one embodiment power heats a tubing from adjacent the surface to a selected level to prevent the formation of solids. The tubing is heated by passing an electric current therethrough. In one form the tubing is insulated from the wellhead and the casing ...


3
Joseph F Jackson, Steven S Gill: Surgical appliance for forming an opening through the skin. Pratt Burnerd International, Richard E Jenkins, January 5, 1988: US04716901 (288 worldwide citation)

The invention relates to a surgical appliance for forming an opening through the skin of a patient and for distending the opening so formed. The appliance takes the form of a trocar which may comprise two separate components or two component portions formed by openings in a tube extending partially ...


4
Mark S Wrighton, Henry S White Jr, James W Thackeray: Microelectrochemical devices. Massachusetts Institute of Technology, Patrea L Pabst, January 5, 1988: US04717673 (264 worldwide citation)

Very stable, polymer-based electrochemical devices, formed by polymerization of thiophene or a derivative such as 3-methylthiophene which is durable in an aqueous electrolyte over a wide pH range, which respond rapidly to chemical or electrical signals, are disclosed. In one embodiment, the device f ...


5
Artur Fischer, Wolfgang Kramer: Bone fastener. Artur Fischer, Michael J Striker, January 5, 1988: US04716893 (244 worldwide citation)

A fastener for anchoring in a bore in a bone has a screw extending along an axis and having a substantially cylindrical outer surface formed with a helical screwthread. The screw has at the screwthread a thread diameter and between the turns of the thread at the surface a root diameter smaller than ...


6
Steven R Erbstoesser, Claude E Cooke Jr, Richard G Sinclair, Michael M Epstein: Use of degradable ball sealers to seal casing perforations in well treatment fluid diversion. Exxon Production Research Company, Hubert E Cox, Gary D Lawson, January 5, 1988: US04716964 (218 worldwide citation)

Plugging perforations in casing in a wellbore penetrating a subterranean formation using degradale ball sealers. The ball sealer used is composed of a polyester polymer which is substantially insoluble in the wellbore fluid. The polymer degrades in the presence of water at an elevated temperature to ...


7
Lee S Weinblatt: Survey of radio audience. Frishauf Holtz Goodman & Woodward, January 5, 1988: US04718106 (207 worldwide citation)

A technique for surveying an audience. A portable signal detector unit picks up audible sounds reproduced by a radio set from signals transmitted by a given radio station. Among the broadcast signals is one unique to that particular station. The unit includes means capable of identifying that signal ...


8
Lalit R Bahl, Peter V deSouza, Steven V DeGennaro, Robert L Mercer: Speech recognition system. International Business Machines, Marc A Block, January 5, 1988: US04718094 (198 worldwide citation)

Speech words are recognized by first recognizing each spectral vector identified by a label (feneme), then identifying the word by matching the string of labels against phones using simplified phone machines based on label and transition probabilities and Merkov chains. In one embodiment, a detailed ...


9
John F Krumme: Slotted autoregulating heater. Metcal, Hall Myers & Rose, January 5, 1988: US04717814 (196 worldwide citation)

Designation of specific heating zones and increase in minimum resistance relative to prior heaters of the type to which the present invention pertains is achieved, together with flexibility or bendability, if desired, by slotting the outer conductor of the heater. Additional flexibility is also achi ...


10
John S Mattis: Coaxial connector moisture seal. Raychem, Dennis E Kovach, January 5, 1988: US04717355 (158 worldwide citation)

A plug for sealing an end of a coupling assembly secured to an end of a coaxial cable includes a flange having an end face which has a cross-sectional area substantially less than a cross-sectional area of a threaded portion of the plug, the end face being urged against an end face of the coupling a ...