Pre-cast concrete unit for manholes
Latest Moduloc Concrete Products (London) Ltd. Patents:
Description
FIG. 1 is a top perspective view of the design;
FIG. 2 is a bottom perspective view thereof.
Referenced Cited
U.S. Patent Documents
Foreign Patent Documents
| D30695 | May 1899 | Greger |
| D30697 | May 1899 | Greger |
| 315836 | April 1885 | Raynald |
| 2346361 | April 1944 | Cupido |
| 1,364,447 | August 1974 | UK |
Patent History
Patent number: D246384
Type: Grant
Filed: Aug 9, 1976
Date of Patent: Nov 15, 1977
Assignee: Moduloc Concrete Products (London) Ltd. (Concorde)
Inventors: Brian E. Brown (Burlington), Alfred G. Hall (London)
Primary Examiner: A. Hugo Word
Attorney: Davidson C. Miller
Application Number: 5/712,761
Type: Grant
Filed: Aug 9, 1976
Date of Patent: Nov 15, 1977
Assignee: Moduloc Concrete Products (London) Ltd. (Concorde)
Inventors: Brian E. Brown (Burlington), Alfred G. Hall (London)
Primary Examiner: A. Hugo Word
Attorney: Davidson C. Miller
Application Number: 5/712,761
Classifications
