# US 12,722,003 B1 · Apparatus, system, and methods for generating electrical field therapy (EFT) voltages

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- Number: US 12,722,003 B1
- Document ID: US12722003B1
- Status: Granted
- Kind: B1
- Application number: 19/408,500
- Filed: 2025-12-04
- Granted: 2026-09-01
- Earliest claimed: 2025-12-04
- Assignees: Nguyen Tat Thanh University
- Applicants: Thang Viet Tran; Tan Minh Tran; Y Nhu Nguyen; Hien Thi Nguyen
- Inventors: Thang Viet Tran; Tan Minh Tran; Y Nhu Nguyen; Hien Thi Nguyen
- Web page: https://patentgrep.com/patent/US12722003B1

## CPC

- A61N 1/36021: {for treatment of pain}
- A61N 1/025: {Digital circuitry features of electrotherapy devices, e.g. memory, clocks, processors}
- A61N 1/0456: {Specially adapted for transcutaneous electrical nerve stimulation [TENS]}
- A61N 1/06: for high-frequency therapy
- A61N 1/32: alternating or intermittent currents {(applying electric fields by inductive or capacitive coupling A61N1/40; microwave apparatus A61N5/02)}
- A61N 1/326: {for promoting growth of cells, e.g. bone cells}
- A61N 1/36002: {Cancer treatment, e.g. tumour}
- A61N 1/36025: {for treating a mental or cerebral condition}
- A61N 1/3603: {Control systems}
- A61N 1/36031: {using physiological parameters for adjustment}
- A61N 1/36034: {specified by the stimulation parameters}
- A61N 1/40: Applying electric fields by inductive or capacitive coupling (microwave apparatus A61N5/00); {Applying radio-frequency signals}
- A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B)

## Abstract

An electrical field therapeutic (EFT) device is disclosed. The EFT device includes selector for selecting a voltage level including either an IF voltage or high voltages with a predetermined signal type and a treatment duration, a generator for generating the IF signal if the IF voltage is selected; a first transformer for transforming an AC wall outlet voltage into a plurality of low voltages if the high voltages are selected; a device for transforming the plurality of low voltages into the predetermined signal type; and a third transformer for transforming the low voltage with the predetermined signal type into the high voltage of the predetermined signal type.

## Claims

### Claim 1

A method for generating electric field therapeutic (EFT) voltages characterized as continuous sinusoidal signals, comprising:
(a) selecting ETF voltages including either IF signals for a first type of treatment or high voltage signals for second type of treatments, wherein said IF signals have preset IF amplitudes and an IF frequency and wherein said high voltage signals have high voltage amplitudes and preset frequencies;
(b) if said IF voltages are selected, then generating said IF signal by generating a reference signal from an oscillator, transforming said reference signal to said IF frequency and said IF amplitudes using a high frequency transformer (HFT), said protecting said If amplitudes using a band pass filter;
(c) otherwise, if said high voltage signals are selected then first transforming an AC wall outlet voltage at 110V/220V with 50 Hz/60 Hz frequency into a plurality of low voltages using a low voltage transformer (LVT); second, selecting one of said plurality of low voltages using respective plurality of relay circuits, wherein each plurality of low voltages is input into corresponding respective said plurality of relay circuits;
(d) transforming said selected plurality of low voltages into either regular sinusoidal signal, an alpha (α) type signal or a beta (β) type signal;
(e) protecting said regular sinusoidal signal, said alpha type signal, and said beta type signal using a current limiting op-amp;
(f) up converting said protected alpha type signal and said beta type signal into either a positive high voltage (PHV) or a negative high voltage (NHV) using a high voltage transformer;
(g) saving said ETF voltages, treatment data, and technical problems in a memory device; and
(h) communicating said ETF voltages, said treatment data, and said operation problems to external devices using a second microcontroller (IoTCTR).

### Claim 2 (depends on 1)

The method of claim 1 wherein said step (a) further comprises selecting said ETF voltages and treatment durations using an HMI touchscreen electrically coupled to a microprocessor control unit (MCU).

### Claim 3 (depends on 2)

The method of claim 2 wherein said HMI touchscreen electrically coupled to said first microprocessor control unit (MCU) by a MODBUS communication.

### Claim 4 (depends on 3)

The method of claim 3 wherein said MODBUS communication is RS485 twisted pair electrical cable.

### Claim 5 (depends on 1)

The method of claim 1 wherein said IF voltages have a peak-to-peak amplitude of 2800V at a frequency of 70 kHz.

### Claim 6 (depends on 1)

The method of claim 1 wherein said high voltage signals comprise 800V, 1000V, 1500V, 3000V, 4500V, 9000V, 14000V, and 16000V at a frequency of 50 Hz/60 Hz.

### Claim 7 (depends on 6)

The method of claim 6 wherein said plurality of low voltages comprises 6.25V, 7.8V, 12V, 23.5V, 35V, 70V, 110V, and 125V.

### Claim 8 (depends on 7)

The method of claim 7 wherein said second microcontroller (IoTCTR) communicate said ETF voltages, said treatment data, and said operation problems to said external devices using a wireless communication channel.

### Claim 9 (depends on 8)

The method of claim 8 wherein said wireless communication channel comprises a Wi-fi communication.

### Claim 10 (depends on 9)

The method of claim 9 further comprising retrieving said ETF voltages and said treatment data from said memory device built internal to said first microcontroller.

### Claim 11

An electrical field therapeutic device, comprising:
a selector for selecting ETF voltages including either IF voltages for a first type of therapeutic treatment or high voltages for a second type of therapeutic treatment, and a treatment duration;
an IF signal generator for generating said IF voltages, wherein said IF generator further comprises an oscillator for generating a sinusoidal signal at a preset IF frequency and a preset IF amplitude and a high frequency transformer (HFT) operative to transform said sinusoidal signal to said IF voltages;
a bandpass filter, electrically coupled to said IF signal generator, operative to protect said IF voltages;
a low voltage transformer for transforming an AC wall outlet voltage of 110V/120V at a respective frequency of 50 Hz/60 Hz into a plurality of low voltages if said high voltages are selected, wherein said low voltage transformer further comprises a switch coupled to select either 110V AC wall outlet voltage or 120V AC wall outlet voltage;
a relay system electrically coupled to select one of said plurality of low voltages in accordance with inputs of said selector;
a high voltage transformer, electrically coupled to said relay system, operative to transform said selected plurality of low voltages to said high voltages;
a protector circuit, electrically coupled to said high voltage transformer, operative to protect said high voltages from distortions;
a first microprocessor operative to communicate said IF voltages corresponding to said first type of therapeutic treatment, said high voltages corresponding to said second type of therapeutic treatment, and said treatment duration;
a second microprocessor, electrically coupled to said selector, operative to control said plurality of relay circuits and store said IF voltages corresponding to said first type of therapeutic treatment and said high voltages corresponding to said second type of therapeutic treatment.

### Claim 12 (depends on 11)

The device of claim 11 wherein said selector further comprises an HMI touchscreen that is coupled to said first microprocessor by a MODBUS communication link.

### Claim 13 (depends on 12)

The device of claim 12 wherein wherein said MODBUS communication is a RS485 twisted pair electrical cable.

### Claim 14 (depends on 13)

The device of claim 13 wherein said first microprocessor is characterized as having a wireless communication capability.

### Claim 15 (depends on 14)

The device of claim 14 wherein said wireless communication link is a Wi-Fi.

### Claim 16 (depends on 15)

The device of claim 15 wherein said IF signal has a peak-to-peak amplitude of 2800V at a frequency of 70 kHz.

### Claim 17 (depends on 16)

The device of claim 16 wherein said high voltages comprises 800V, 1000V, 1500V, 3000V, 4500V, 9000V, 14000V, and 16000V at a frequency of 50 Hz/60 Hz.

### Claim 18 (depends on 11)

The device of claim 11 wherein said relay system further comprises a plurality of relay circuits, an alpha (α) inductor, and a beta (β) inductor.

### Claim 19 (depends on 18)

The device of claim 18 wherein said protector circuit further comprises a current limiting op-amp.

### Claim 20 (depends on 19)

The device of claim 19 wherein said second microprocessor is a RISC based microcontroller with flash memory.