IP Library › Granted Patent US 12,669,225
Granted Patent B2
US 12,669,225 · App. 18/929,586 · Granted Jun 30, 2026

Three-wire flat cable high-voltage plug-in light string and method of making thereof

Inventor: Zhumei Deng (Dongguan, CN)
Assignee: Dongguan Yongfeng Lighting Co., Ltd
F21S4/10F21V19/0025F21V31/005F21Y2103/10F21Y2115/10
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Quick Facts
Patent No.
US 12,669,225
App. No.
18/929,586
Filed
Oct 28, 2024
Granted
Jun 30, 2026
Kind
B2
Art Unit
2875
USPC
362/249.06
Abstract

A method of making a light string is disclosed. The method includes: providing a three-wire flat cable comprising a middle wire between two outer wires; cutting the middle wire at a first place to expose a first end and a second end of the middle wire; connecting a light source to the exposed first end and second end of the middle wire; inserting a tail cover of a lamp holder to protect the exposed first end and second end of the middle wire; wrapping the light source in a heat shrink tube to waterproof the light source; securing a lamp head on the tail section of the lamp holder; and attaching a decorative shell to the lamp head.

Claims (16)

1 . A method of making a light string comprising:

providing a three-wire flat cable comprising a middle wire between two outer wires;

cutting the middle wire at a first place to expose a first end and a second end of the middle wire;

connecting a light source to the exposed first end and second end of the middle wire;

inserting a tail cover of a lamp holder to protect the exposed first end and second end of the middle wire;

wrapping the light source in a heat shrink tube to waterproof the light source;

securing a lamp head on the tail section of the lamp holder; and

attaching a decorative shell to the lamp head,

wherein the tail cover comprises two parallel pieces that each is inserted between the middle wire and one of the outer wires.

2 . The method of claim 1 , wherein the light source comprises a light emitting diode (LED).

3 . The method of claim 1 , wherein the light source comprises a filament strip LED.

4 . The method of claim 1 , wherein the light source comprises a first leg and a second leg; and

Wherein the first leg and the second leg are riveted to the exposed first end and second end of the middle wire, respectively.

5 . The method of claim 1 , wherein the light source comprises a two-wire SMD LED light string.

6 . The method of claim 1 , wherein the parallel pieces of the tail cover extend to cover at least part of the light source.

7 . The method of claim 1 , further comprising inserting a waterproof accessory inside the lamp head between a flat surface of the three-wire flat cable and the tail piece of the lamp head.

Assignments (2)
CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNEE NAME AND ADDRESS FROM DONGGUAN YONGFENG LIGHT CO., LTD, NO. 55, NORTH 9TH STREET, EAST QIAOTOUQQIAO ROAD QIAOTOUDONGGUAN, CHINA 523575 TO DONGGUAN YONGFENG LIGHTING CO., LTD, ROOM 703, BUILDING 10, NO. 10 QIAOXING WEST 2ND ROAD,QIAOTOU TOWN, DONGGUAN CITY, GUANGDONG PROVINCE, CHINA 523518 PREVIOUSLY RECORDED ON REEL 70052 FRAME 631. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT OF ASSIGNORS INTEREST . Recorded Dec 16, 2025
From: DENG, ZHUMEI
To: DONGGUAN YONGFENG LIGHTING CO., LTD
Reel/Frame 073992/0692 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 29, 2025
From: DENG, ZHUMEI
To: DONGGUAN YONGFENG LIGHT CO., LTD
Reel/Frame 070052/0631 →
Continuity (1)
Related Publication 20260117944A1 · Apr 30, 2026
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