CA208338A - Construction de tunnels - Google Patents

Construction de tunnels

Info

Publication number: CA208338A
Authority: CA; Canada
Prior art keywords: tunnel construction; tunnel; construction
Prior art date: 1921-02-08
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

CA208338A

Other languages

English (en)

Inventor

Peter Helfrich Gustav

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

1921-02-08

1921-02-08 Application granted granted Critical

1921-02-08 Publication of CA208338A publication Critical patent/CA208338A/fr

Status Expired legal-status Critical Current

Links

238000010276 construction Methods 0.000 title 1

CA208338A Construction de tunnels Expired CA208338A (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CA208338T

Publications (1)

Publication Number	Publication Date
CA208338A true CA208338A (fr)	1921-02-08

Family

ID=35102117

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA208338A Expired CA208338A (fr)			Construction de tunnels

Country Status (1)

Country	Link
CA (1)	CA208338A (fr)

0
- CA CA208338A patent/CA208338A/fr not_active Expired

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