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The ornamental design for a spirometer base unit, as shown and described. |
FIG. 1 is a perspective view of a spirometer base unit showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a back elevational view thereof;
FIG. 6 is a right side elevational view thereof; and,
FIG. 7 is a left side elevational view thereof.
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Mar 12 1990 | SWEENEY, PAUL B JR | WELCH ALLYN, INC , 4341 STATE STREET ROAD, SKANEATELES FALLS, NY 13153 A CORP OF NY | ASSIGNMENT OF ASSIGNORS INTEREST | 005260 | /0354 | |
Mar 30 1990 | Welch Allyn, Inc. | (assignment on the face of the patent) | / | |||
Jun 17 1994 | AUSMEDICS PTY LTD | NEECON PTY LTD | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 007058 | /0246 |
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