US4841972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-frequency treatment device directed to use in bath
Assignee: Individual
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Filing: 1987-11-03
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Granted: 1989-06-27
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Expires: 2007-11-03
Abstract
Abstract A low-frequency treatment device directed to use in bath, comprising a pair of electrodes; a switching transistor; a battery connected in series with the pair of electrodes and a main current path of said switching transistor; and means for oscillating a surged treatment wave at a prescribed time interval, the output terminal being connected with the base of said switching transistor to control its conduction.
Inventors
- 👤 Kazumi Masaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:50
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61N1/44; A61N1/445; A61N1/18; A61N1/32
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
83 words
A low frequency treatment device for treatment of a subject's body in a bath comprising a battery; a pair of electrodes which come into contact with the subject's body when in use; a switching transistor having a main current path connected with said battery only through said pair of electrodes; and means for oscillating an interrupted train of pulses, said oscillating means having an output terminal connected with a base of said switching transistor to control the conduction of the main current path.
Claim 2
Dependent Claim
83 words
A low frequency treatment device for treatment of a subject's body in a bath comprising a battery; a pair of electrodes which come into contact with the subject's body when in use; a switching transistor having a main current path connected with said battery only through said pair of electrodes; and means for oscillating an interrupted train of pulses, said oscillating means having an output terminal connected with a base of said switching transistor to control the conduction of the main current path.
Claim 3
Dependent Claim
69 words
The low frequency treatment device of claim 1 wherein said oscillating means includes a first oscillator generating a low-frequency voltage, and a second oscillator generating a voltage higher in frequency than that generated by said first oscillator, said second oscillator having an input terminal connected with an output terminal of said first oscillator, and said second oscillator having the output terminal connected with the base of said switching transistor.
Claim 4
Dependent Claim
23 words
The low frequency treatment device of claim 2 wherein said first oscillator is a multivibrator and said second oscillator is also a multivibrator.
Claim 5
Dependent Claim
23 words
The low frequency treatment device of claim 2 wherein said first oscillator is a multivibrator and said second oscillator is a blocking oscillator.
Claim 6
Dependent Claim
89 words
A low frequency treatment device comprising a bath in which a subject's body is partially immersed; a battery; a pair of electrodes which come into contact with the subject's body when in use; a switching transistor having a main current path connected with said battery only through said pair of electrodes; and means for oscillating an interrupted train of pulses at a prescribed time interval, said oscillating means having an output terminal connected with a base of said switching transistor to control the conduction of the main current path.
Claim 7
Dependent Claim
89 words
A low frequency treatment device comprising a bath in which a subject's body is partially immersed; a battery; a pair of electrodes which come into contact with the subject's body when in use; a switching transistor having a main current path connected with said battery only through said pair of electrodes; and means for oscillating an interrupted train of pulses at a prescribed time interval, said oscillating means having an output terminal connected with a base of said switching transistor to control the conduction of the main current path.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-26 | 1992-12-26 | 1993-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-26 | 1996-12-26 | 1997-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-26 | 2000-12-26 | 2001-06-27 | $7700.00 | Window Closed / Lapsed |