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Simon Newcomb, astronomer ; 1888
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| Number | Title | Issue Date |
| 4626129 | Sub-soil drainage piping A sub-soil drainage pipe segment 12 comprises a first round cylindrical portion 14 forming a socket 16 and a second round cylindrical portion 18 integral with and extending from the first portion, the inside diameter of the first portion being substantial... | 12/02/1986 |