Battery, Vaccum Tube, Transistor Or Spark Plug Tester (11) Patents (Class D10/77)
  • Battery checker
    Patent number: D244125
    Type: Grant
    Filed: June 25, 1975
    Date of Patent: April 26, 1977
    Assignee: Curtis Dyna Products Corporation
    Inventor: Johannes Van Den Haak
  • Electrical battery test instrument
    Patent number: D249937
    Type: Grant
    Filed: December 28, 1976
    Date of Patent: October 17, 1978
    Inventors: David J. Jacobson, Marvin Zaro
  • Spark plug service unit
    Patent number: D250755
    Type: Grant
    Filed: October 12, 1976
    Date of Patent: January 9, 1979
    Assignee: Champion Spark Plug Company
    Inventors: Lawrence R. Lentz, Ronald E. Blackman, Donald M. Potter
  • Rechargeable battery checker
    Patent number: D252502
    Type: Grant
    Filed: February 7, 1977
    Date of Patent: July 31, 1979
    Assignee: Union Carbide Corporation
    Inventor: William T. Kelly, III
  • Hand tool for inductively testing continuity in electrical ignition systems and for removing spark plug boots
    Patent number: D256442
    Type: Grant
    Filed: December 21, 1977
    Date of Patent: August 19, 1980
    Inventor: George G. Martin
  • Portable electronic tester and analyzer
    Patent number: D260617
    Type: Grant
    Filed: November 21, 1979
    Date of Patent: September 8, 1981
    Assignee: Honeywell Inc.
    Inventors: Phillip N. Lawson, II, James A. Odom, Jr.
  • Battery tester
    Patent number: D261240
    Type: Grant
    Filed: June 28, 1979
    Date of Patent: October 13, 1981
    Assignee: New Era Products, Inc.
    Inventors: Gary W. Vest, James C. Loase
  • Battery tester
    Patent number: D270142
    Type: Grant
    Filed: May 13, 1981
    Date of Patent: August 16, 1983
    Assignee: Cable Electric Products, Inc.
    Inventor: Frederick W. Schwartz
  • Combination battery charger and tester
    Patent number: D273580
    Type: Grant
    Filed: August 28, 1981
    Date of Patent: April 24, 1984
    Inventor: Conrad L. Riumbau
  • Combined battery charger, power supply and battery tester
    Patent number: D277845
    Type: Grant
    Filed: August 31, 1982
    Date of Patent: March 5, 1985
    Assignee: Vanson Electronics Limited
    Inventor: Joseph W. K. Ip
  • Battery tester
    Patent number: D278212
    Type: Grant
    Filed: April 26, 1982
    Date of Patent: April 2, 1985
    Assignee: Cable Electric Products, Inc.
    Inventor: Frederic W. Schwartz
  • Battery state-of-charge meter
    Patent number: D288791
    Type: Grant
    Filed: November 7, 1983
    Date of Patent: March 17, 1987
    Assignee: Curtis Instruments, Inc.
    Inventor: Richard P. Bezikos
  • Battery tester
    Patent number: D297420
    Type: Grant
    Filed: September 23, 1985
    Date of Patent: August 30, 1988
    Assignee: Cable Electric Products, Inc.
    Inventor: Frederic W. Schwartz
  • Compact battery-tester or similar article
    Patent number: D297516
    Type: Grant
    Filed: August 30, 1985
    Date of Patent: September 6, 1988
    Inventor: Louis Wang
  • Barricade warning light testing device
    Patent number: D299440
    Type: Grant
    Filed: April 28, 1986
    Date of Patent: January 17, 1989
    Inventor: Thomas W. Barker
  • Portable battery tester
    Patent number: D299909
    Type: Grant
    Filed: March 17, 1986
    Date of Patent: February 21, 1989
    Assignee: Associated Equipment Corporation
    Inventor: Ralph F. Casey
  • Engine analyzer
    Patent number: D299910
    Type: Grant
    Filed: June 23, 1986
    Date of Patent: February 21, 1989
    Assignee: Snap-on Tools Corporation
    Inventors: Donald W. Doman, Gerald R. Bakula, Raymond R. Zuzinec, Sr., Thomas J. Christensen, Jack A. Parise
  • Battery tester
    Patent number: D304426
    Type: Grant
    Filed: July 25, 1986
    Date of Patent: November 7, 1989
    Inventor: Donald C. Bergstedt
  • Ignition checker
    Patent number: D327853
    Type: Grant
    Filed: December 8, 1989
    Date of Patent: July 14, 1992
    Assignee: Oppama Industry Co., Ltd.
    Inventor: Hiromi Watanabe
  • Battery tester
    Patent number: D330338
    Type: Grant
    Filed: April 19, 1990
    Date of Patent: October 20, 1992
    Inventor: James Wang
  • Dry cell tester
    Patent number: D330519
    Type: Grant
    Filed: October 21, 1991
    Date of Patent: October 27, 1992
    Inventor: Stuart Wang
  • Combination spark plug gauge and adjuster
    Patent number: D330520
    Type: Grant
    Filed: November 22, 1991
    Date of Patent: October 27, 1992
    Assignee: Chemi-Trol Chemical Co.
    Inventor: Dale O. Meadows
  • Status indicating device
    Patent number: D344241
    Type: Grant
    Filed: April 14, 1992
    Date of Patent: February 15, 1994
    Inventor: Franklin Kaunitz
  • Battery checker
    Patent number: D350701
    Type: Grant
    Filed: April 12, 1993
    Date of Patent: September 20, 1994
    Assignee: Guardforce Corporation
    Inventor: Hui-Jen Pan
  • Fuse condition indicator
    Patent number: D350905
    Type: Grant
    Filed: February 8, 1993
    Date of Patent: September 27, 1994
    Inventor: Lorenz S. Kiernicki
  • Combined electronic calculator and battery tester
    Patent number: D351185
    Type: Grant
    Filed: June 25, 1992
    Date of Patent: October 4, 1994
    Assignee: Casio Computer Co., Ltd.
    Inventors: Makoto Matsuda, Yuichi Onumata
  • Battery monitor
    Patent number: D354244
    Type: Grant
    Filed: September 3, 1993
    Date of Patent: January 10, 1995
    Assignee: Battery Master Inc.
    Inventors: Gerard P. Gibbons, Vuford L. Lynde
  • Fuse integrity indicator
    Patent number: D359247
    Type: Grant
    Filed: December 16, 1993
    Date of Patent: June 13, 1995
    Inventor: James T. Bushey
  • Spark plug gauge with cap adjuster
    Patent number: D367619
    Type: Grant
    Filed: August 19, 1994
    Date of Patent: March 5, 1996
    Assignee: A&E Mfg. Co., Inc.
    Inventors: Thomas W. Burrows, Richard J. Conway, Jr.
  • Battery tester
    Patent number: D393222
    Type: Grant
    Filed: July 16, 1997
    Date of Patent: April 7, 1998
    Assignee: Stuart Instrument Co., Ltd.
    Inventor: Kuo-Hsiang Wang