Assignee

GRUBBA ROBERT A

2 granted patents·8 citations·filing 2006–2008

Technology mixA63H2

Top patents by PatentIndex Score

2 records

0172US7749040B2Smoke production system for model locomotiveGRUBBA ROBERT A·Filed 2008·Granted Jul 6, 2010·4 cites·14 claims
0271US7634411B2Synchronized externally generated sound effects for model trainsGRUBBA ROBERT A·Filed 2006·Granted Dec 15, 2009·4 cites·15 claims

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