Ventilator
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Description
FIG. 1 is a top and right side perspective view of a ventilator, showing my new design;
FIG. 2 is a bottom left side perspective view thereof;
FIG. 3 is an end elevational view thereof; and
FIG. 4 is a bottom plan view thereof.
Referenced Cited
U.S. Patent Documents
Other references
3399 | March 1869 | Sturtevant |
3300122 | January 1967 | Bowles et al. |
4676717 | June 30, 1987 | Willyard, Jr. et al. |
- New York Blower Co. Catalog, p. 10, FRP Radial Fume Exhauster, top middle, side of page.
Patent History
Patent number: D315949
Type: Grant
Filed: Nov 14, 1989
Date of Patent: Apr 2, 1991
Assignee: Soft Construction AB (Stockholm)
Inventor: Bengt Sello (Stockholm)
Primary Examiner: James M. Gandy
Assistant Examiner: Lisa Lichtenstein
Law Firm: Kinzer, Plyer, Dorn, McEachran & Jambor
Application Number: 7/436,534
Type: Grant
Filed: Nov 14, 1989
Date of Patent: Apr 2, 1991
Assignee: Soft Construction AB (Stockholm)
Inventor: Bengt Sello (Stockholm)
Primary Examiner: James M. Gandy
Assistant Examiner: Lisa Lichtenstein
Law Firm: Kinzer, Plyer, Dorn, McEachran & Jambor
Application Number: 7/436,534
Classifications
Current U.S. Class:
Vent, Ductwork, Or Element Thereof (D23/393)