TREA

Pipe plug latch unit

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Information

  • Patent Grant
  • D329686
  • Patent Number
    D329,686
  • Date Filed
    Thursday, June 14, 1990
    35 years ago
  • Date Issued
    Tuesday, September 22, 1992
    33 years ago
Information
Abstract
Description
Claims
  • The ornamental design for the pipe plug latch unit, as shown and described.
US Referenced Citations (16)
Number Name Date Kind
D208016 Bullard Jun 1967
D242521 Plympton Nov 1976
D257218 Eriksson Oct 1980
D283246 Jack Apr 1986
D300350 Mathison Mar 1989
D305927 Linderman et al. Feb 1990
2566816 Work Sep 1951
2810401 Stansbury Oct 1957
3672403 Wilson et al. Jun 1972
3747541 Reese Jul 1973
4073168 Takada Feb 1978
4370919 Wagner Feb 1983
4415005 Janzen Nov 1983
4493344 Mathison et al. Jan 1985
4614206 Mathison et al. Sep 1986
4762151 Kinnan Aug 1988
Non-Patent Literature Citations (4)
Entry
Morrison Bros Co, Dubuque IA, Monitoring Wall Specification Guide, Apr. 1989, pp. 1-3 and 6.
Chama Corp., IN, Monitor Wells product brochure, pp. 1-3, dated Jan. 1, 1989.
Crane Enterprises, Helena, MT, Locking Well Caps product brochure, 1986, pp. 1 and 2.
EBW, Inc., Muskegon, MI, Well Cap Plugs Advertisement, Feb. 1990/WWJ, p. 1.