Patents by Inventor Rodney L. Johnson

Rodney L. Johnson 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).

  • Patent number: 5429432
    Abstract: A folding, collapsible playroom adapted for compact storage which is designed to encourage active and creative play by children as opposed to passive activities such as watching television.The playroom has first and second frames having transversely spaced apart top and bottom walls and opposite side walls all having front and rear surfaces, thereby defining inner and outer frame faces respectively. The frames are pivotally connected such that they may be pivoted from an open, upstanding position to an abutting, closed storage position. Play accessories are included which may be pivotally mounted on one of the frame inner faces and adapted to be moved from a secured stored position to a deployed, play position protruding substantially forwardly from the frame, upon movement of the frames from the closed storage position to the open, upstanding position.
    Type: Grant
    Filed: April 25, 1994
    Date of Patent: July 4, 1995
    Inventor: Rodney L. Johnson
  • Patent number: 5359087
    Abstract: The present invention provides bioactive compounds of the general formula: ##STR1## wherein R is H, (C.sub.1 -C.sub.4)alkyl, (C.sub.3 -C.sub.6)cycloalkyl, (C.sub.3 -C.sub.6)cycloalkyl(C.sub.1 -C.sub.4)alkyl, allyl, (C.sub.6 -C.sub.10)aryl or (C.sub.1 -C.sub.4)alkylCO.sub.2 Y; Y is H, (C.sub.1 -C.sub.4)alkyl or (C.sub.6 -C.sub.10)aryl; each X is individually H, (C.sub.1 -C.sub.4)alkyl, (C.sub.6 -C.sub.10)aryl, (C.sub.3 -C.sub.6)cycloalkyl(C.sub.1 -C.sub.4)alkyl, or (C.sub.3 -C.sub.6)cycloatkyl; the bond represented by--is present or is absent; and the pharmaceutically acceptable salts thereof, and methods for using said compounds to stimulate receptors in the mammalian nervous systems.
    Type: Grant
    Filed: June 3, 1993
    Date of Patent: October 25, 1994
    Assignee: Regents of the University of Minnesota
    Inventors: Rodney L. Johnson, Nalin L. Subasinghe, James F. Koerner
  • Patent number: 4033883
    Abstract: A gasoline dispenser control and data system comprising a central office and a plurality of local stations, each station having dispenser control functions, data storage functions and communication functions. The station has a dispenser control mode and data entry mode. In the dispenser control mode a dispenser may be set to dispense gasoline, such dispensing of gasoline resulting in the production of pulses which are accumulated in a counter. The dispenser may then be reset for the next sale. Upon reset the counter is returned to zero, and the previous sale is stored in a temporary memory for recall and display, also being stored in two separate permanent memories, one of which is accessible to the station operator and the other of which is not accessible to the station operator. In the data entry mode the station operator can enter data into some but not all permanent memories. The station data system may be telephoned by the central office and each memory interrogated.
    Type: Grant
    Filed: October 9, 1975
    Date of Patent: July 5, 1977
    Assignee: Dresser Industries, Inc.
    Inventors: Herbert G. Zinsmeyer, Rodney L. Johnson, Ralph H. Genz, James E. Setliff
  • Patent number: 3935741
    Abstract: A storage tank liquid level sensor for indicating levels of two immiscible liquids in the tank wherein a first magnet is carried by a float on top of one liquid and a second magnet is carried by a float on top of the other liquid, the first magnet operating a switch to indicate when the one liquid reaches a predetermined level and the second magnet moving a coded tape with respect to a read head in accordance with changes in the level of the other liquid, a transmitter to transmit data from the read head, a receiver for such data, an arithmetic logic unit to convert the data to binary coded decimals, a memory unit for storage of BCD data, and a display unit for selectively addressing the computer and displaying selected data.
    Type: Grant
    Filed: March 7, 1974
    Date of Patent: February 3, 1976
    Assignee: Dresser Industries, Inc.
    Inventors: Herbert G. Zinsmeyer, Rodney L. Johnson, Ralph H. Genz