Patents Represented by Attorney, Agent or Law Firm Herbert M. Shapiro
  • Magnetic bubble memory with single-level bubble functional elements
    Patent number: 4181979
    Abstract: Magnetic bubble functional elements are implemented by aperture patterns in a single layer of electrically-conducting material. The operations of the elements are compatible with single-level conductor driven bubble memories described in A. H. Bobeck patent applications, Ser. Nos. 857,921 now U.S. Pat. No. 4,143,419 issued Mar. 6, 1979 and 856,925, filed Dec. 6, 1977, and in A. H. Bobeck-F. J. Ciak patent application, Ser. No. 899,578, filed Apr. 24, 1978 now abandoned.
    Type: Grant
    Filed: June 12, 1978
    Date of Patent: January 1, 1980
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Andrew H. Bobeck
  • Magnetic bubble memory with expander-detector arrangement
    Patent number: 4181978
    Abstract: An expander-detector arrangement for a conductor-access, magnetic bubble memory is realized by the inclusion in an electrically-conducting layer in which bubble propagation currents are impressed sets of apertures operative to enlarge a bubble laterally. For this purpose increasingly greater numbers of apertures are arranged laterally with respect to the axis of bubble movement through successive stages of the expander-detector arrangement. The actual detector is formed at the stage including the maximum number of apertures.
    Type: Grant
    Filed: April 24, 1978
    Date of Patent: January 1, 1980
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Andrew H. Bobeck
  • Radiation mask structure
    Patent number: 4171489
    Abstract: The discovery that boron nitride and boron carbide films can be made in tension allows nondistorting radiation windows or masks to be realized. Both low and high pressure techniques for making the tensile films lead to related mask structures utilizing such films. The resulting structures are sufficiently distortion free to be useful for x-ray lithography.
    Type: Grant
    Filed: September 13, 1978
    Date of Patent: October 16, 1979
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Arthur C. Adams, Cesar D. Capio, Hyman J. Levinstein, Ashok K. Sinha, David N. Wang
  • Magnetic bubble packaging arrangement
    Patent number: 4164790
    Abstract: A magnetic bubble memory of the field-access type employs a novel package arrangement for containing the field coils within desired limits during fabrication of the package.
    Type: Grant
    Filed: December 27, 1977
    Date of Patent: August 14, 1979
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Paul C. Michaelis
  • Magnetic bubble memory
    Patent number: 4162537
    Abstract: A high speed magnetic bubble memory is realized with two like-apertured metallic layers each adapted for substantially uniform overall current flow. The apertures locally modify the current flow to provide localized field gradients for moving bubbles in an adjacent bubble layer. The patterns of apertures in the two layers are offset with respect to one another and the layers are pulsed in sequence in a manner to move bubbles along propagation paths defined by the patterns of apertures.
    Type: Grant
    Filed: June 12, 1978
    Date of Patent: July 24, 1979
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Andrew H. Bobeck
  • Conductor-access, magnetic bubble memory
    Patent number: 4143420
    Abstract: A conductor-access, magnetic bubble memory is realized with a single metallization level for propagation. The familiar undulating or serpentine conductor pattern used for moving bubbles is modified to allow a simple and easily realizable, low power drive arrangement where currents flow parallel to the bubble paths.
    Type: Grant
    Filed: December 6, 1977
    Date of Patent: March 6, 1979
    Assignee: Bell Telephone Laboratories Incorporated
    Inventor: Andrew H. Bobeck
  • Magnetic bubble memory with single level electrically-conducting, drive arrangement
    Patent number: 4143419
    Abstract: A conductor-access magnetic bubble memory is realized with a single electrically-conductive film for the propagation of bubbles. The film is characterized by sequences of apertures in the film. The sequences define paths for bubble movement in response to controlled current pulses. Ion-implanted regions offset with respect to the aperture edges ensure unidirectional bubble movement along the paths.
    Type: Grant
    Filed: December 6, 1977
    Date of Patent: March 6, 1979
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Andrew H. Bobeck
  • Conductor-driven magnetic bubble memory with an expander-detector arrangement
    Patent number: 4142247
    Abstract: A magnetic bubble memory with a single electrically-conducting layer for defining a bubble propagate arrangement is adapted to provide a compatible bubble expander detector by a sequence of increasingly larger apertures in the conducting layer.
    Type: Grant
    Filed: December 6, 1977
    Date of Patent: February 27, 1979
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Andrew H. Bobeck
  • Conductor-access, magnetic bubble memory
    Patent number: 4142249
    Abstract: A low power, conductor-access, bubble memory is realized with a single level of metallization for providing the requisite propagation fields. Sets of apertures in the conducting layer define bubble paths, and permalloy elements aligned with the apertures overlie the conducting layer at end portions and contact the exposed bubble layer at midportions. Current flow is established transverse to the bubble paths.
    Type: Grant
    Filed: December 6, 1977
    Date of Patent: February 27, 1979
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Andrew H. Bobeck
  • Integrated read only memory
    Patent number: 4139907
    Abstract: The word conductors of a semiconductor integrated ROM are foreshortened where permitted by the organization of data in the memory. The space made available by the eliminated portions of the word conductors is used for electrical connection to the bit conductors from the sides of the array rather than at the ends. A space reduction of about thirty percent is achieved.
    Type: Grant
    Filed: August 31, 1977
    Date of Patent: February 13, 1979
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Donald E. Blahut, James A. Cooper, Jr.
  • Integrable bidirectional shift register in analog-to-digital converter
    Patent number: 4122442
    Abstract: A multistage bidirectional shift register for a differential pulse code system, simple enough to be integrated inexpensively, is achieved by taking advantage of the code configuration conditions permitted by the pulse code system. The system requires only a single stage of the register to be switched at a time. This enables odd and even stages of the register to be switched independently and leads to the employment of relatively few elements per stage.
    Type: Grant
    Filed: July 20, 1977
    Date of Patent: October 24, 1978
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: James Lowell Henry
  • Sacrificial arc suppressors in magnetic bubble memories
    Patent number: 4094002
    Abstract: Magnetic bubble memory chips herein are characterized by circuits of permalloy and/or electrical conductors which include patterns designed to be sacrificed if electrical charges build up during processing or handling. Improved chip yield results.
    Type: Grant
    Filed: March 21, 1977
    Date of Patent: June 6, 1978
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Andrew Henry Bobeck
  • Magnetoresistive detector for magnetic bubble memory
    Patent number: 4085453
    Abstract: A magnetic bubble memory includes an expansion detector having a detector stage with elements having modified chevron-shaped, or "F"-shaped, geometries. The new element geometry avoids unwanted magnetic poles which characterize prior art elements of the detector stage when interlinked into a single magnetoresistive element.
    Type: Grant
    Filed: November 8, 1976
    Date of Patent: April 18, 1978
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Andrew Henry Bobeck, Peter Istvan Bonyhard, Terence John Nelson
  • Magnetoresistive element for detecting magnetic bubbles
    Patent number: 4056814
    Abstract: The chevron elements of a detector stage of a magnetic bubble memory are interconnected in a manner to allow tailoring of the output signals produced in response to the presence of an elongated bubble. The tailoring is shown to allow a design which is characterized by an improved signal-to-noise ratio.
    Type: Grant
    Filed: March 10, 1976
    Date of Patent: November 1, 1977
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Andrew Henry Bobeck, Henry Evelyn Derrick Scovil
  • Fault tolerant magnetic bubble memory
    Patent number: 4056812
    Abstract: A field-access, magnetic bubble memory organized in a major-minor configuration includes an extra set of minor loops dedicated to fault correction. The loops of the extra set are coupled to a major path in a manner to move the information in the loops of the set controllably out of synchronism with respect to the information in the remaining loops. Thus, information in the loops of the extra set can be inserted into the data stream originating from the remaining loops at positions of missing data from faulty ones of those loops.
    Type: Grant
    Filed: May 6, 1976
    Date of Patent: November 1, 1977
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Andrew Henry Bobeck, Robert Frederick Fischer
  • Magnetic bubble memory bias magnet arrangement
    Patent number: 4027298
    Abstract: An in-plane magnetic holding field, long known to provide improved operating margins for a magnetic bubble memory during stop-start operation, is produced by a unique bias magnet design which provides a constant in-plane bias field in a manner consistent with normal bubble propagation as well as with stop-start operation.
    Type: Grant
    Filed: November 5, 1975
    Date of Patent: May 31, 1977
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Paul Charles Michaelis
  • Magnetic bubble memory bias magnet arrangement
    Patent number: 4025911
    Abstract: An in-plane magnetic holding field, long known to provide improved operating margins for a magnetic bubble memory during stop-start operation, is produced by unique bias magnet designs each of which provides a constant in-plane bias field in a manner consistent with normal bubble propagation as well as with stop-start operation.
    Type: Grant
    Filed: October 23, 1975
    Date of Patent: May 24, 1977
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Andrew Henry Bobeck, Roman Kowalchuk
  • Magnetic bubble PROM memory
    Patent number: 4021791
    Abstract: A fast access, major-minor, magnetic bubble memory is provided by defining a separate set of address minor loops in addition to the minor loops of a main storage area in which data is stored. A search operation is restricted to the address loops, selected data being read out of the main storage area only after the selected address is acquired.
    Type: Grant
    Filed: April 20, 1976
    Date of Patent: May 3, 1977
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Andrew Henry Bobeck, Robert Frederick Fischer
  • Magnetic bubble memories with nonobstructing crossings between conductor and permalloy patterns
    Patent number: 4020476
    Abstract: A field-access magnetic bubble memory employs both a pattern of magnetic elements to define paths along which bubbles move in reponse to a magnetic field reorienting in the plane of bubble movement and electrical conductors which, inter alia, control bubble movement between paths. The crossings between the pattern of conductors and the pattern of magnetic elements have been found to be only negligibly disruptive of bubble movement if the conductors are carefully oriented with respect to the magnetic elements.
    Type: Grant
    Filed: February 4, 1976
    Date of Patent: April 26, 1977
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Peter Istvan Bonyhard, James Lanson Smith
  • Single-wall domain arrangement
    Patent number: RE29677
    Abstract: The transfer of a domain from one channel to another in a single-wall domain memory is effected by a transfer loop into which a domain is moved by a field from a pulsed conductor and from which a domain exits in response to a magnetic field rotating in the plane of the layer in which domains move. The transfer loop includes two "exit-entrance" positions associated with the two channels between which transfer occurs. The exit of a domain from the transfer loop may be aided by a pulsed conductor also.
    Type: Grant
    Filed: December 20, 1974
    Date of Patent: June 20, 1978
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Peter Istvan Bonyhard, Paul Charles Michaelis