Manhole cover
Description
FIG. 1 is a top plan view of a manhole cover showing our new design;
FIG. 2 is a bottom plan view thereof; and,
FIG. 3 is a side elevational view thereof.
Referenced Cited
U.S. Patent Documents
Foreign Patent Documents
| D27673 | September 1897 | Greger |
| 284203 | September 1883 | Herr |
| 821736 | May 1906 | Potter |
| 2004335 | June 1935 | Merriman |
| 217,789 | June 1924 | GBX |
Patent History
Patent number: D291833
Type: Grant
Filed: May 7, 1984
Date of Patent: Sep 8, 1987
Inventors: John E. (Bud) Shore (Edmonton, Alberta T5G 0H7), Cornelius P. Smythe (Sherwood Park, Alberta T8G 1C1), Jack W. McKinley (Edmonton, Alberta)
Primary Examiner: A. Hugo Word
Application Number: 6/608,074
Type: Grant
Filed: May 7, 1984
Date of Patent: Sep 8, 1987
Inventors: John E. (Bud) Shore (Edmonton, Alberta T5G 0H7), Cornelius P. Smythe (Sherwood Park, Alberta T8G 1C1), Jack W. McKinley (Edmonton, Alberta)
Primary Examiner: A. Hugo Word
Application Number: 6/608,074
Classifications
Current U.S. Class:
Underground Service Vault (4) (D25/36)
