Patent
   D335966
Priority
Feb 22 1990
Filed
Feb 22 1990
Issued
Jun 01 1993
Expiry
Jun 01 2007
Assg.orig
Entity
unknown
38
10
n/a
The ornamental design for a step stool, as shown and described.

FIG. 1 is a front elevational view of a step stool showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevational view, the right side being a mirror image thereof;

FIG. 6 is a cross-sectional view of the tread surfaces of FIG. 2 thereof;

FIG. 7 is a top plan view, of a second embodiment, the difference being in the removal of the diagonal tread strips on each step thereof;

FIG. 8 is a bottom plan view, the difference being in the removal of the rib structure under each step thereof; and,

FIG. 9 is a perspecitve view of the first embodiment of FIGS. 1-5.

Schwartzkopf, Robert A., Ruggles, Roy L.

Patent Priority Assignee Title
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D361899, Jan 13 1994 Rubbermaid Incorporated Stool
D367967, Apr 19 1995 Rubbermaid Incorporated Step stool
D376909, Dec 27 1995 Continental Commercial Products, LLC Tool box
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D564674, Jan 12 2007 1244311 B C LTD Step stool
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D811784, Sep 18 2015 Stackable workbench
D855833, Jan 04 2017 TRICAM INDUSTRIES, INC Ladder rail
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D865386, Oct 26 2018 ILOVE, INC. Step stool
D923950, Sep 13 2019 Elbee Pty Ltd Step stool
D923991, Sep 13 2019 Elbee Pty Ltd Tread for a step
D924577, Sep 13 2019 Elbee Pty Ltd Step stool
D925934, Feb 20 2020 Elbee Pty Ltd Step stool
D934583, Feb 20 2020 Elbee Pty Ltd Step stool
D935207, Aug 21 2017 WERNER CO One-step work platform
D942789, Feb 20 2020 Elbee Pty Ltd Tread for a step
D944903, Feb 15 2019 Coulter Ventures, LLC. Plyometric box
D955124, Jun 10 2021 SHENZHEN CONGLIDA TECHNOLOGY CO., LTD. Stepstool
ER501,
ER8761,
Patent Priority Assignee Title
4458963, Aug 27 1982 Hempe Manufacturing Co. Tool caddy stool
181793,
194399,
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D288719, Sep 12 1984 Marine boarding stepladder
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47686,
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Feb 12 1990RUGGLES, ROY L COSCO, INC ASSIGNMENT OF ASSIGNORS INTEREST 0052560329 pdf
Feb 14 1990SCHWARTZKOPF, ROBERT A COSCO, INC ASSIGNMENT OF ASSIGNORS INTEREST 0052560329 pdf
Feb 22 1990Cosco, Inc.(assignment on the face of the patent)
Jun 01 1998COSCO, INC COSCO MANAGEMENT, INC ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0102630474 pdf
Jun 01 1998COSCO, INC COSCO MANAGEMENT, INC RE-RECORD TO CORRECT PATENT NUMBER 4456303 PREVIOUSLY RECORDED AT REEL 010263, FRAME 0474 0108140495 pdf
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