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Patent US 3701993A: Difference between revisions
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|Office=US | |Office=US | ||
|Number=3701993A | |Number=3701993A | ||
|Title=Ramp generator a chart recorder | |Title=Ramp generator [for] a chart recorder | ||
|Company=Tektronix Inc | |Company=Tektronix Inc | ||
|Inventors= | |Inventors=Hans Geerling | ||
|Filing date=1971-06-28 | |Filing date=1971-06-28 | ||
|Grant date=1972-10-31 | |Grant date=1972-10-31 | ||
}} | }} | ||