Attachment for turning door knobs

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Information

Patent Grant
D320923

References
Source

Patent Number
D320,923
Date Filed
Monday, September 19, 1988
36 years ago
Date Issued
Tuesday, October 22, 1991
33 years ago

Inventors
- Norbert Leopoldi
Original Assignees
- The Cloverline, Inc.
Examiners
- Feifer; Melvin B.
- Hyder; Philip
Agents
- Gerstein; Milton S.

US Classifications
- D08 - Tools and hardware
Field of Search
- US
- D08 308
- D08 321
- 016 114
- 016 121
- 074 557
- 292 3363
- 292 347
- 292 DIG 2
- 292 DIG 71
- Term of Grant
  14Years

Information

Abstract

Description

Claims

The ornamental design for an attachment for turning door knobs, as shown and described.

US Referenced Citations (8)

Number	Name	Date	Kind
D295605	Leopoldi	May 1988
2801122	Sutter	Jul 1957
3960396	Miyahara	Jun 1976
4223931	Neary	Sep 1980
4285536	McCoy et al.	Aug 1981
4397489	Lind	Aug 1983
4504087	Pennington	Mar 1985
4783883	Szalay	Nov 1988