Patents by Inventor Tim Madsen

Tim Madsen 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).

  • Multi-purpose state changing munition
    Patent number: 10066915
    Abstract: A multi-purpose munition operates in either a blast mode or a fragmentation mode according to a user input. When operating in the fragmentation mode, a fuze initiates a main explosive fill of the munition which in turn disperses fragments formed from a fragmentation layer of the munition. When operating in a blast mode, prior to initiating the main explosive fill, the fuze initiates a secondary energetic layer which discards the fragmentation layer. The fuze then initiates the main explosive fill thereby producing a blast effect.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: September 4, 2018
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Matthew Hall, Jessica Perciballi, Tim Madsen, Jack Pincay
  • Thin film head with contoured pole face edges for undershoot reduction
    Patent number: 5406434
    Abstract: A thin film magnetic read/write head is manufactured using Al.sub.2 O.sub.3 dams. The Al.sub.2 O.sub.3 dams are formed using a sacrificial layer which is deposited upon a bottom pole layer. An Al.sub.2 O.sub.3 layer is deposited over the sacrificial layer. When the sacrificial layer is removed, the Al.sub.2 O.sub.3 layer forms dams between which a top pole piece is deposited. The sacrificial layer is removed using lapping and a selected chemical etch; etch of the sacrificial layer which lifts-off overlying partial lapping or chemical etch followed by chemical Al.sub.2 O.sub.3 ; depositing photoresist dams and chemically, etching the encapsulation layer and the sacrificial layer; or removal through physical or thermal shock of the Al.sub.2 O.sub.3 layer sputtered at zero bias followed by a selective chemical etch of the sacrificial layer.
    Type: Grant
    Filed: June 20, 1994
    Date of Patent: April 11, 1995
    Assignee: Seagate Technology, Inc.
    Inventors: Nurul Amin, John Bortins, Ying D. Yan, Beat G. Keel, Nathan Curland, Tim Madsen
  • Method of making a thin film head with contoured pole face edges for undershoot reduction
    Patent number: 5137750
    Abstract: A thin film magnetic read/write head is manufactured using Al.sub.2 O.sub.3 dams. The Al.sub.2 O.sub.3 dams are formed using a sacrificial layer which is deposited upon a bottom pole layer. An Al.sub.2 O.sub.3 layer is deposited over the sacrificial layer. When the sacrificial layer is removed, the Al.sub.2 O.sub.3 layer forms dams between which a top pole piece is deposited. The sacrificial layer is removed using lapping and a selected chemical etch; partial lapping or chemical etch followed by chemical etch of the sacrificial layer which lifts-off overlying Al.sub.2 O.sub.3 ; depositing photoresist dams and chemically etching the encapsulation layer and the sacrificial layer; or removal through physical or thermal shock of the Al.sub.2 O.sub.3 layer sputtered at zero bias followed by a selective chemical etch of the sacrificial layer.
    Type: Grant
    Filed: May 20, 1991
    Date of Patent: August 11, 1992
    Assignee: Seagate Technology, Inc.
    Inventors: Nurul Amin, John Bortins, Ying D. Yan, Beat G. Keel, Nathan Curland, Tim Madsen