CA549170A - Noiseless manhole frame and cover - Google Patents

Noiseless manhole frame and cover

Info

Publication number
CA549170A
CA549170A CA549170A CA549170DA CA549170A CA 549170 A CA549170 A CA 549170A CA 549170 A CA549170 A CA 549170A CA 549170D A CA549170D A CA 549170DA CA 549170 A CA549170 A CA 549170A
Authority
CA
Canada
Prior art keywords
noiseless
cover
manhole frame
manhole
frame
Prior art date
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
CA549170A
Other languages
French (fr)
Inventor
M. A. Bourck Joseph
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
Publication date
Application granted granted Critical
Publication of CA549170A publication Critical patent/CA549170A/en
Expired legal-status Critical Current

Links

CA549170A Noiseless manhole frame and cover Expired CA549170A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA549170T

Publications (1)

Publication Number Publication Date
CA549170A true CA549170A (en) 1957-11-26

Family

ID=35710545

Family Applications (1)

Application Number Title Priority Date Filing Date
CA549170A Expired CA549170A (en) Noiseless manhole frame and cover

Country Status (1)

Country Link
CA (1) CA549170A (en)

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