Drilldown: Patents
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Patents > Inventors:
John Abt
& Company
:
Tektronix Inc
or
The Grass Valley Group, Inc.
& Filing date:
October 1986
& Grant date:
October 1987 ![](/tekwiki/extensions/Cargo/drilldown/resources/filter-x.png)
![](/tekwiki/extensions/Cargo/drilldown/resources/filter-x.png)
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