Assignee

IVANOV VALENTIN A

SU·2 granted patents·19 citations·filing 1980–1980

Technology mixE21D2

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2 records

0155US4315701AShuttering for erecting a concrete tunnel liningIVANOV VALENTIN A·Filed 1980·Granted Feb 16, 1982·13 cites·2 claims
0236US4371290AShuttering for establishing concrete lining of tunnelsIVANOV VALENTIN A·Filed 1980·Granted Feb 1, 1983·6 cites·4 claims

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