IP Library Granted Patent US 12,507,782
Granted Patent B2
US 12,507,782 · App. 18/174,030 · Granted Dec 30, 2025

Personal defense tool

Inventors: Susan Monahan (New Haven, CT); Eric Cotton (Stratford, CT)
Assignee: Susan Monahan
A45D24/14A45D8/12A45D24/02F41B13/00A45D2024/002
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 12,507,782
App. No.
18/174,030
Granted
Dec 30, 2025
Kind
B2
Abstract

A personal defense tool has a secondary function as a hair styling tool. The personal defense tool includes a handle portion for grasping by a user's hand or fingers, and a plurality of prongs extending from the handle portion. The prongs are configured to puncture a skin surface of an attacker while also being configured to comb or be retained within a user's hair.

Claims (32)

1 . A personal defense tool, comprising:

a plurality of rings for receiving a user's fingers; and

a plurality of piercing elements extending from the plurality of rings, each piercing element of the plurality of piercing elements forming an oblique end surface configured to pierce a clothing and skin surface of an attacker, a top surface of the piercing element forming an obtuse angle with the oblique end surface and a bottom surface of the piercing element forming an acute angle with the oblique end surface, wherein the bottom surface providing a surface depression formed therein configured to retrieve and retain a sample of organic material, the plurality of piercing elements further comprises:

a middle piercing element extending perpendicularly from an outer circumference of a middle ring of the plurality of rings;

a first outer piercing element positioned adjacent a first side of the middle piercing element; and

a second outer piercing element positioned adjacent a second side of the middle piercing element, the first and second outer piercing elements being angled inwardly toward the middle piercing element in a direction from a first end of each of the plurality of piercing elements to a second end of each of the plurality of piercing elements; and

an arcuate surface extending between the first and second ends,

wherein the middle piercing element is longer than the first and second outer piercing elements.

2 . The personal defense tool of claim 1 , wherein the plurality of piercing elements taper in diameter along a length thereof in a direction from a first end extending from the plurality of rings toward a second end spaced apart from the first end and including the oblique end surface.

3 . The personal defense tool of claim 1 , wherein the plurality of piercing elements is formed from a composite mesh of woven metal and plastic.

4 . The personal defense tool of claim 1 , further comprising a sheath, the plurality of piercing elements being housed in the sheath.

5 . The personal defense tool of claim 4 , wherein the plurality of piercing elements are fabricated from a metal, and the sheath is fabricated from a plastic.

6 . The personal defense tool of claim 1 , wherein each of the piercing elements extends from one ring of the plurality of rings.

7 . A hair styling tool, comprising:

a gripping structure including a plurality of rings configured for receiving a user's fingers;

a plurality of piercing elements extending from the gripping structure, including a central piercing element, the central piercing element being the longest piercing element and outer piercing elements are angled inwardly towards the central piercing element, and each piercing element of the plurality of piercing elements further comprises:

an oblique end surface configured to pierce a clothing and skin surface of an attacker, a top surface of the piercing element forming an obtuse angle with the oblique end surface and a bottom surface of the piercing element forming an acute angle with the oblique end surface;

a convex top surface extending along a length of the piercing element; and

a concave bottom surface extending along the length of the piercing element; wherein each piercing element comprises a metallic core enclosed in

a plastic sheath and the central piercing element extending perpendicularly from an outer circumference of a middle ring of the plurality of rings.

8 . The hair styling tool of claim 7 , wherein the gripping structure is integrally formed with the plurality of piercing elements.

9 . The hair styling tool of claim 7 , wherein each piercing element of the plurality of metallic piercing elements tapers in diameter along the length thereof in a direction from a first end toward a second end.

10 . A personal defense tool, comprising:

a gripping structure including a plurality of rings configured for receiving a user's fingers;

a middle piercing element extending perpendicularly from an outer circumference of a central ring of the plurality of rings, the middle piercing element having a convex top surface extending along a length thereof, and a concave bottom surface extending along the length thereof, the middle piercing element having an oblique end surface, wherein the top surface of the piercing element forms an obtuse angle with the oblique end surface and the bottom surface of the piercing element forms an acute angle with the oblique end surface;

a first outer piercing element positioned adjacent a first side of the middle piercing element and extending from the gripping structure, the first outer piercing element being shorter than the middle piercing element and angling inwards towards the middle piercing element; and

a second outer piercing element positioned adjacent a second side of the middle piercing element and extending from the gripping structure, the second outer piercing element being shorter than the middle piercing element, angling inwards towards the middle piercing element.

11 . The personal defense tool according to claim 10 , wherein the oblique end surface is at a tip of each of the piercing elements.

12 . The personal defense tool according to claim 11 , wherein the middle piercing element has a first lateral side and a second lateral side, the concave bottom surface of the middle piercing element has a concave shape extending between the first lateral side and the second lateral side.

13 . The personal defense tool of claim 2 , wherein the plurality of piercing elements taper in diameter along a length thereof in a direction from the first end toward the second end and is formed from a composite of woven metal and plastic.

14 . The personal defense tool of claim 1 , wherein the plurality of piercing elements comprise at least five piercing elements.

15 . The personal defense tool of claim 7 , wherein the plurality of piercing elements comprise at least five piercing elements.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 24, 2023
From: COTTON, ERIC
To: MONAHAN, SUSAN
Reel/Frame 062795/0630 →
Continuity (4)
Continuation 29868860 · Dec 15, 2022
Provisional Application 63416125 · Oct 14, 2022
Provisional Application 63313877 · Feb 25, 2022
Related Publication 20230270227A1 · Aug 31, 2023
References Cited (55)
US 2199282A · Condron · 1940 [cited by examiner]
US 3145718A · Pigo · 1964 [cited by examiner]
US 4566472A · Mueller · 1986 [cited by examiner]
US 5437293A · Colon · 1995 [cited by examiner]
US 5829643A · Isabella · 1998 [cited by applicant]
US 5927291A · Beall · 1999 [cited by examiner]
US 6427702B1 · Silva · 2002 [cited by examiner]
US D500546S · Anderson · 2005 [cited by applicant]
US D510121S · Blair · 2005 [cited by applicant]
US 7231925B1 · Wall · 2007 [cited by examiner]
US 8839521B2 · Hazard · 2014 [cited by applicant]
US D726969S · Sato et al. · 2015 [cited by applicant]
US D812813S · Stephenson · 2018 [cited by examiner]
US 10449683B2 · Spencer et al. · 2019 [cited by applicant]
US 11027439B2 · Levine et al. · 2021 [cited by applicant]
US 20050199255A1 · Silva · 2005 [cited by applicant]
US 20060090770A1 · Wall · 2006 [cited by applicant]
US 20090065015A1 · Tran · 2009 [cited by examiner]
US 20120037176A1 · Ito · 2012 [cited by examiner]
US 20120192427A1 · Hazard · 2012 [cited by examiner]
US 20130047317A1 · Hanover · 2013 [cited by examiner]
US 20150320172A1 · Spencer · 2015 [cited by examiner]
US 20170280837A1 · Simkin-Brocato · 2017 [cited by applicant]
US 20170355090A1 · Spencer · 2017 [cited by examiner]
US 20230157431A1 · Uzochukwu · 2023 [cited by examiner]
US 20230270227A1 · Monahan · 2023 [cited by examiner]
CN 202104410U · 2012 [cited by applicant]
CN 106490778A · 2017 [cited by applicant]
CN 206079464U · 2017 [cited by applicant]
CN 306931485 · 2021 [cited by applicant]
CN 307466479 · 2022 [cited by applicant]
DE 3934342A1 · 1991 [cited by applicant]
FR 903904002 · 1990 [cited by applicant]
GB 2012970B · 1991 [cited by applicant]
KR 3008360100000 · 2016 [cited by applicant]
KR 3010843060000 · 2020 [cited by applicant]
Free3d “Knuckle duster 3D Model” (A downloadable 3D model) [online]. Retrieved from the Internet: https://free3d.com/3d-model/wolverine-claws-5958.html (Year: 2017). [cited by examiner]
Balistas, Knuckle Duster with Black Spikes, Sep. 14, 2022, 4 pages. [cited by applicant]
Barber Salon, Donna Afro Twist Comb, Aug. 9, 2022, 3 pages. [cited by applicant]
Bigstock, Iron Brass Knuckles with Spikes, Sep. 14, 2022, 3 pages. [cited by applicant]
BUDK, Black Cat Self Defense Keychain, Sep. 14, 2022, 5 pages. [cited by applicant]
Ewa Bochen, Knuckle Comb, Aug. 10, 2022, 3 pages. [cited by applicant]
Hala Craft, Art Nouveau Ginko Hair Comb, Aug. 9, 2022, 11 pages. [cited by applicant]
Indus International, K 10 Self Defense Knuckle, Sep. 14, 2022, 5 pages. [cited by applicant]
Jean Pierre FUSIL, Black knuckle-duster with peaks, Sep. 14, 2022, 5 pages. [cited by applicant]
Kombativ, Black Spiked Knuckles, Sep. 14, 2022, 4 pages. [cited by applicant]
Kombativ, Black Steel Claws, Sep. 14, 2022, 4 pages. [cited by applicant]
Kombativ, Brass Tiger Claws, Sep. 14, 2022, 4 pages. [cited by applicant]
Liu Jun, Stainless Steel Rings Geometric knuckles Simple Hidden Cool Silver Rings for Men Women, Sep. 14, 2022, 8 pages. [cited by applicant]
Pantera, Pantera Fantasy Dagger Claw Knife, https://www.swordsknivesanddaggers.com/pantera-fantasy-dagger-claw-knife/, Sep. 14, 2022, 4 pages. [cited by applicant]
Sarah, Tiger Claw Four Finger Brass Knuckle Ring, Sep. 14, 2022, 2 pages. [cited by applicant]
Superhero Claws, Sep. 14, 2022, 9 pages. [cited by applicant]
Tactical Gears, Heavy Steel Knuckles with Spikes, Sep. 14, 2022, 5 pages. [cited by applicant]
TigerLady, Women's Self Defense-Natural scratching tool for women's safety, Sep. 14, 2022, 5 pages. [cited by applicant]
Wish, Knuckles Punch, Sep. 14, 2022, 2 pages. [cited by applicant]