Class 346/52 - Markers under selective control of element normally discrete from recorder

Subclass of Class 346 - Recorders
Definition: Plural records involving the use of printing, dotting, or
No. of patents: 3
Last issue date: 06/30/1987

Number	Title	Issue Date
4677446	Watchman's clock The present apparatus concerns round monitoring and includes a portable recording device together with a plurality of keys for indicating different locations through which a watchman is to pass. In order to simplify the drive mechanism of the apparatus, t...	06/30/1987
4573129	Automatic pen-sensor A bi-directional pen plotter includes two pen stables and a pen holder located between the two pen stables for snatching a pen from either pen stable and for inserting a pen into either pen stable. There are four distinct stops to the motion of the pen ho...	02/25/1986
3959633	Security guard recording system A watchman's tour recording system which includes a watchman's unit having a clock means for producing digital time signals, a station identification signal producing means for producing digital station signals, at least two digital bit storage or memory ...	05/25/1976

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