Robert "Bob" Grubba was the director of engineering for Lionel Trains in the late 1990s.

He started Broadway Limited Imports in 2001 with partners Tony Wenzel of Oriental Limited and Bob Zimet of QS Industries, maker of QSI sound systems. Broadway Limited Imports was the first company to offer sound and remote control equipped HO trains, and won the Model Railroader Magazine 2002 and 2003 Product of the Year and HO Model of the Year awards. Mr. Zimet and Mr. Wenzel sold their shares to Mr. Grubba in 2004 and the company was moved to Ormond Beach, Florida.

In 2004, Grubba founded Precision Craft Models, Inc. which was the first company to install sound systems and remote control in the smaller N scale model trains.

Robert Grubba holds the following US patents:

Patent No. Title
1 7,307,394 Control and motor arrangement for use in model train
2 7,298,103 Control and motor arrangement for use in model train
3 7,215,092 Radio-linked, bi-directional control system for model electric trains
4 7,211,976 Control and motor arrangement for use in model train
5 6,765,356 Control and motor arrangement for use in model train
6 6,616,506 Inserted molded traction tire for a model toy train
7 6,485,347 Puffing fan driven smoke unit for a model train
8 6,441,570 Controller for a model toy train set
9 6,186,074 Drive assembly for model train
10 5,188,173 Pressure control system and cable guiding device for use in drilling wells
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