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Patent
   D320923
Priority
Sep 19 1988
Filed
Sep 19 1988
Issued
Oct 22 1991
Expiry
Oct 22 2005
Inventors
Leopoldi, …
Assg.orig
The Clover…
Assg.curr
The Clover…
Entity
unknown
Referenced by
4
References
8
Maint.:
n/a
The ornamental design for an attachment for turning door knobs, as shown and described.

FIG. 1 is a perspective view of an attachment for turning door knobs 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; and

FIG. 5 is a side elevational view thereof.
INVENTORS:

Leopoldi, Norbert

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
D340401, Jul 18 1991 Wagner Spray Tech Corporation Stand for a paint gun handle
D344662, Apr 14 1992 Tool for grasping round knobs
D361020, May 23 1994 Holder for turning keys
D951703, Sep 08 2020 Kitchinventions, LLC Ergonomic handle and utensil holder accessory
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
2801122,
3960396, Jun 17 1974 Dowa Co., Ltd. Handle for opening and closing a door
4223931, Jun 25 1979 Schlage Lock Company Doorknob attachment
4285536, Nov 23 1979 DAYTON METAL DOOR, INC , A CORP OF OHIO Universal lever handle attachment for door knob
4397489, Dec 22 1980 Lever adapter for door knob
4504087, Jun 30 1980 Lever attachment for a rotary door knob
4783883, Feb 02 1987 Lever assists for door knobs
D295605, Dec 12 1984 CHEMICAL BANK, AS COLLATERAL AGENT Lever adapter for door knobs
ASSIGNMENT RECORDS    Assignment records on the USPTO
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Sep 19 1988The Cloverline, Inc.(assignment on the face of the patent)
MAINTENANCE FEES AND DATES:    Maintenance records on the USPTO
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