Laboratory filter

The ornamental design for a laboratory filter, substantially as shown and described.

FIG. 1 is a perspective view of a laboratory filter embodying my new design, the broken lines being for illustration purposes only;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a top plan view thereof; and

FIG. 4 is a bottom plan view thereof.

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Executed on	Assignor	Assignee	Conveyance	Frame	Reel	Doc
Jun 27 1983	TJERNAGEL, GERALD P	TREND SCIENTIFIC, INC	ASSIGNMENT OF ASSIGNORS INTEREST	004154	0459	pdf
Jul 18 1983		Trend Scientific, Inc.	(assignment on the face of the patent)
Jan 24 1990	TREND SCIENTIFIC, INC	MERIDIAN DIAGNOSTICS, INC A CORP OF OH	ASSIGNMENT OF ASSIGNORS INTEREST	005230	0580	pdf

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