Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Inventor
Walter Denis Harding
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IndividualfiledCriticalIndividual
Application grantedgrantedCritical
Publication of GB190520781ApublicationCriticalpatent/GB190520781A/en
20,781. Harding, W. D. Jan. 26, 1906. Drawings to Specification. Drain pipes are made porous with one or both ends non-porous or solid. The body of the pipe maybe entirely or partly porous. In one example, the upper half-only-of the pipe is porous.