Damper unit

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Information

Patent Grant
D271615

References
Source

Patent Number
D271,615
Date Filed
Monday, April 6, 1981
43 years ago
Date Issued
Tuesday, November 29, 1983
41 years ago

Inventors
Original Assignees
- Energy Vent, Inc.
Examiners
- Largen; James R.
Agents
- Dybvig & Dybvig

US Classifications
- D23 - Environmental heating and cooling
Field of Search
- US
- D23 127
- 236 1 G
- 236 49
- 236 93 R
- 236 101 D
- 251 305
- 251 337
- 098 40 VT
- 137 4542
International Classifications
- Term of Grant
  14Years

Information

Abstract

Description

Claims

The ornamental design of a damper unit, as shown and described.

US Referenced Citations (12)

Number	Name	Date	Kind
D268281	Prikkel	Mar 1983
1337904	Hall	Apr 1920
1659875	Jacobs	Feb 1928
2959933	Burke	Nov 1960
2975975	Weber	Mar 1961
3273798	Kuiper	Sep 1966
3366333	Diehl	Jan 1968
3753548	Jung et al.	Aug 1973
3804366	Rubright	Apr 1974
4165833	Nagel	Aug 1979
4290552	Prikkel	Sep 1981
4361272	Prikkel et al.	Nov 1982