Assignee

VANN TOOL COMPANY INC

2 granted patents·44 citations·filing 1974–1976

Technology mixE21B2

Top patents by PatentIndex Score

2 records

0166US4040485AMethod of simultaneously setting a packer device and actuating a vent assemblyVANN TOOL COMPANY INC·Filed 1976·Granted Aug 9, 1977·27 cites·14 claims
0254US3931855ADownhole packer actuated vent assemblyVANN TOOL COMPANY INC·Filed 1974·Granted Jan 13, 1976·17 cites·7 claims

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