USD176874S - Rotary ventilator - Google Patents

Rotary ventilator Download PDF

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Publication number
USD176874S
USD176874S US D176874 S USD176874 S US D176874S
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US
United States
Prior art keywords
rotary ventilator
ventilator
rotary
milwaukee
wis
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Edward P. Mattke
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United States Patent Ofifice "6,874
Patented Feb. 7, 1956 ROTARY VENTILATOR Edward P. Mattke, Milwaukee, Wis., assignor to Loeffel= holz Company, Milwaukee, Wis., a corporation of Wisconsin Application July 14, 1954, Serial No. 31,423
Term of patent 14-years (Cl. D62-3l Figure 1 is a perspective view of a rotary ventilator References Cited in the. file of this patent embodying my new design, showing the front and one side thereof. and UNITED STATES PATENTS Figure 2 is a perspective of the ventilator Viewing 1 111,547 McDerment Sept. 27, 1938 from the opposite back corner, 680,865 Jordan et a1. Aug. 20, 1901 Iclairn: 1,469,022 Robinson Sept. 25, 1923 The ornamental design for a rotary ventilator, as shown.

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