Observation monitoring well manhole cover

Information

  • Patent Grant
  • D309024
  • Patent Number
    D309,024
  • Date Filed
    Tuesday, March 1, 1988
    36 years ago
  • Date Issued
    Tuesday, July 3, 1990
    34 years ago
  • US Classifications
    Field of Search
    • US
    • D25 35
    • D25 36
    • D20 10
    • D20 17
    • D20 19
    • D20 40
    • D20 41
    • 404 25
    • 404 26
    • 404 43
    • 404 9
    • 052 19
    • 052 20
    • 052 21
    • 046 610
    • 046 612
    • 046 616
    • 046 903
    • D12 203
    • D08 354
    • D08 353
    • D08 355
    • 182 120
    • 182 121
    • 182 122
    • Term of Grant
      14Years
Abstract
Description
Claims
  • The ornamental design for an observation monitoring well manhole cover, as shown and described.
US Referenced Citations (1)
Number Name Date Kind
1282732 Brickford Oct 1918
Foreign Referenced Citations (2)
Number Date Country
607 Jan 1896 GBX
423434 Jan 1935 GBX
Non-Patent Literature Citations (2)
Entry
Signs Giving Definite Instructions Publication, p. 45, Children col. Item #347.
Signs Giving Definite Instructions Publication, p. 41, Stop and Give Way col. Item #124.