CA634983A - Tunnel construction - Google Patents

Tunnel construction

Info

Publication number: CA634983A
Authority: CA; Canada
Prior art keywords: tunnel construction; tunnel; construction
Prior art date: 1962-01-23
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

CA634983A

Inventor

P. Washabaugh Edward

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.)

American Marietta Co

Original Assignee

American Marietta Co

Publication date

1962-01-23

1962-01-23 Application granted granted Critical

1962-01-23 Publication of CA634983A publication Critical patent/CA634983A/en

Status Expired legal-status Critical Current

Links

CA634983A Tunnel construction Expired CA634983A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CA634983T

Publications (1)

Publication Number	Publication Date
CA634983A true CA634983A (en)	1962-01-23

Family

ID=35891165

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA634983A Expired CA634983A (en)			Tunnel construction

Country Status (1)

Country	Link
CA (1)	CA634983A (en)

0
- CA CA634983A patent/CA634983A/en not_active Expired

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