IP Library Granted Patent US 12,558,597
Granted Patent B2
US 12,558,597 · App. 18/418,266 · Granted Feb 24, 2026

Aiming key, putter and method for enhancing the accuracy of aiming

Inventor: David Sheridan Englefield (Cranleigh, GB)
Assignee: Putter Key, LLC
A63B53/0441A63B53/0487
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Quick Facts
Patent No.
US 12,558,597
App. No.
18/418,266
Granted
Feb 24, 2026
Kind
B2
Abstract

A method for enhancing the accuracy of aiming while putting a golf ball with a putter is provided. A head of the putter includes a body having top and bottom surfaces separated by a distance, an interior opening extending part of the distance from the top surface to the bottom surface, a first end and a second end. The second end includes a target and the first end includes an aiming member extending into the opening and towards a center of the target. The method includes the steps of focusing on a pointed end of the aiming member and aligning the pointed end with a hole in the ground, executing a backswing while concentrating on moving the pointed end of the aiming member towards the center of the target, executing a forward swing towards the golf ball, and striking the golf ball to translate the golf ball along the alinement towards the hole.

Claims (31)

1 . An aiming key for enhancing the accuracy of aiming while putting a golf ball comprising a body, the body comprising:

a pair of parallel sides, each parallel side having a first terminus and a second terminus;

a first end extending between the first terminus of each side, the first end being removably attachable to a golf putter;

an arcuate second end extending between the second terminus of each side;

a circular target having a perimeter, the circular target located to create a point of tangency between the perimeter of the circular target and the arcuate second end;

a top surface and a bottom surface;

an interior opening extending from the top surface to the bottom surface and being positioned between the parallel sides, the interior opening including a first interior end and a second interior end having an arcuate shape, wherein the arcuate shape of the second interior end is defined by the perimeter of the circular target; and

an aiming member including a first part and a triangular part, the first part extending from the first end to the first interior end, the triangular part extending from the first interior end into the opening, the triangular part tapering to an end in the interior opening, being separated from the target by a distance, and being aimed at a center of the target.

2 . The aiming key according to claim 1 , wherein the target is a circular clockface including numerals.

3 . The aiming key according to claim 2 , wherein all of the numerals are visible.

4 . The aiming key according to claim 1 , wherein the interior opening comprises a pair of interior parallel sides, one of the interior parallel sides being offset from one of the parallel sides and the other interior parallel side being offset from the other parallel side, wherein:

the first interior end extends between the interior parallel sides;

the second interior end extends between the interior parallel sides; and

the perimeter of the target defines the shape of the second interior end from one interior parallel side to the other interior parallel side.

5 . The aiming key according to claim 1 , wherein the body is made from plastic, aluminum, metal, wood, or a composite including any of these materials.

6 . An aiming key for enhancing the accuracy of aiming while putting a golf ball comprising a body, the body comprising:

a pair of parallel sides, each parallel side having a first terminus and a second terminus;

a first end extending between the first terminus of each side, the first end being removably attachable to a golf putter;

a second end extending between the second terminus of each side, the second end being arcuate;

a circular target having a perimeter;

a point of tangency between the perimeter of the circular target and the arcuate second end;

an interior opening extending through the body and being positioned between the parallel sides, the interior opening including a first interior end and a second interior end; and

an aiming member including a first part and a triangular part, the first part extending from the first end to the first interior end, the triangular part extending from the first interior end into the opening, tapering to an end in the interior opening, and being aimed at a center of the target, wherein the end of the triangular part is separated from the target by a distance.

7 . The aiming key according to claim 6 , wherein the target protrudes into the interior opening.

8 . The aiming key according to claim 6 , wherein the target includes a clockface having numerals.

9 . The aiming key according to claim 8 , wherein all of the numerals are visible.

10 . The aiming key according to claim 6 , wherein the interior opening comprises a pair of interior parallel sides, one of the interior parallel sides being offset from one of the parallel sides and the other interior parallel side being offset from the other parallel side, wherein:

the first interior end extends between the interior parallel sides;

the second interior end extends between the interior parallel sides; and

the perimeter of the target defines the shape of the second interior end from one interior parallel side to the other interior parallel side.

11 . The aiming key according to claim 6 , wherein the body is made from plastic, aluminum, metal, wood, or a composite including any of these materials.

Assignments (2)
CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNEE NAME PREVIOUSLY RECORDED ON REEL 71105 FRAME 800. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Recorded Nov 2, 2025
From: ENGLEFIELD, DAVID, MR.
To: PUTTER KEY, LLC
Reel/Frame 073416/0761 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 13, 2025
From: ENGLEFIELD, DAVID, MR.
To: PUTTER KEY LLC
Reel/Frame 071105/0800 →
Continuity (2)
Continuation 18516791 · Nov 21, 2023
Related Publication 20250161766A1 · May 22, 2025
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