1
Stephen C Jacobsen, Robert L Stephen, Peter Hansen: Bi-directional flow catheter with retractable trocar/valve structure. Motion Control Incorporated, Criddle Thorpe & Western, December 25, 1979: US04180068 (190 worldwide citation)

A bi-directional flow catheter for insertion into the body of a patient for the simultaneous introduction into and withdrawal therefrom of fluid. The catheter includes a primary tube having open distal and proximal ends, and a pair of branching tubes, each of which branch from a different side of th ...


2
Bobby J Reneau: Articulated ball connector for use with pipeline. Donald Gunn, December 25, 1979: US04180285 (141 worldwide citation)

An improved articulated ball connector for use with pipelines as disclosed. In the illustrated embodiment, a sphere is attached to the end of a pipeline. A collar is fitted about the sphere. The collar has a surface contoured to match the surface of the sphere and its rotates or deflects through a d ...


3
Edward J Murry, Joseph F Brumbach: Device and method for applying precise irrigation, aspiration, medication, ultrasonic power and dwell time to biotissue for surgery and treatment. Fibra Sonics, Hill Van Santen Steadman Chiara & Simpson, December 25, 1979: US04180074 (135 worldwide citation)

Apparatus and method for applying aspiration, irrigation, medication and ultrasonic power and dwell time to biotissue for surgery and treatment wherein the pressure for both aspirating and irrigating is precisely and accurately maintained by the use of a differential valve and a control reservoir wh ...


4
Akira Matsuda, Makoto Tanaka, Junichi Murata, Shigeo Yasuda, Hiroshi Nishino: Alarm device for informing reduction of pneumatic pressure of tire. Bridgestone Tire Company, Mitaka Instrument Company, Sughrue Rothwell Mion Zinn and Macpeak, December 25, 1979: US04180795 (115 worldwide citation)

An alarm device for informing reduction of pneumatic pressure of vehicle tires by sensing abnormal change of tire internal pressure of a vehicle when running by a pressure sensing switch, by converting the thus sensed abnormal change into an electric signal and by generating an alarm to an operator. ...


5
Billy L Crowder, Stanley Zirinsky: Method for providing a metal silicide layer on a substrate. International Business Machines Corporation, Pollock Vande Sande & Priddy, December 25, 1979: US04180596 (113 worldwide citation)

A method for providing on a substrate a layer of a metal silicide such as molybdenum silicide and/or tantalum silicide and/or tungsten silicide and/or rhodium silicide which includes coevaporating silicon and the respective metal onto a substrate, and then heat treating the substrate to form the met ...


6
Kazuaki Komori, Hirofumi Kaiyoh: Character recognition and communication system. Nippon Telegraph & Telephone Public Corporation, Frishauf Holtz Goodman & Woodward, December 25, 1979: US04180798 (109 worldwide citation)

A character recognition and communication system, wherein a character appearing on a document is converted into a character image signal at a transmission terminal including, for example, a facsimile scanner and transmitted to the prescribed center, after the character represented by the image signa ...


7
Harry C Fromuth, Kenneth M Shell: Thermoplastic polyesters. Rohm and Haas Company, Michael B Feln, December 25, 1979: US04180494 (106 worldwide citation)

High impact and solvent resistant composition comprising (A) about 25 to 95 percent by weight of an aromatic polyester, (B) about 1 to 8 percent by weight of an aromatic polycarbonate, and (C) and balance to make 100% of a coreshell polymer having a butadiene-based core. Preferably the composition a ...


8
Nam S Choi, Jorge Heller: Novel orthoester polymers and orthocarbonate polymers. Alza Corporation, Paul L Sabatine, Thomas E Ciotti, Edward L Mandell, December 25, 1979: US04180646 (101 worldwide citation)

The invention concerns orthoester and orthocarbonate polymers having a repeating mer comprising a hydrocarbon radical and a symmetrical dioxycarbon unit of the general formula: ##STR1## wherein R.sub.1 is a multivalent hydrocarbon radical, R.sub.2 and R.sub.3 are hydrocarbon radicals with at least o ...


9
John D Cosgrove, Charles D Pettis, Charles E Mullett: Data collection system using telephone lines. International Tel Data Corporation, John E Wagner, December 25, 1979: US04180709 (100 worldwide citation)

A circuit and a computer program for enabling the monitoring of a plurality of switch settings at remote sites by central telephone exchange equipment through regular telephone lines is described. To compensate for slow drift variations in line impedance, the impedance of each line is continually ca ...


10
Harold D Beck, C Paul Kolthoff Jr: Heat exchange apparatus including a toroidal-type radiator. International Harvester Company, Frederick J Krubel, F David AuBuchon, December 25, 1979: US04180130 (88 worldwide citation)

Heat exchange apparatus including a toroidal-type radiator having radially extending cooling air passage-ways formed through the core thereof, a rotary fan positioned radially inwardly of the radiator core, fan shroud means shaped and positioned with respect to the radiator core and the blades of th ...