US5349361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-wave antenna for vehicles
Assignee: Harada Industry Co Ltd
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Filing: 1993-09-20
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Granted: 1994-09-20
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Expires: 2013-09-20
Abstract
Abstract A vehicle antenna for AM/FM and MT waves including a first antenna element for MT waves vertically mounted on the vehicle roof and a second antenna element for AM/FM waves rotatably coupled to the top end of the first antenna element so that the second antenna element can be set at a desired angle relative to the roof of the vehicle. A trap element for blocking MT waves is installed near the lower end of the second antenna element.
Inventors
- 👤 Yoshimi Egashira
- 👤 Ryouichi Miyakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:41
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/08; H01Q1/084; H01Q1/27; H01Q1/32; H01Q1/325; H01Q1/3275; H01Q5/00; H01Q5/30; H01Q5/307; H01Q5/314; H01Q5/321
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
A three-band antenna for use in automobiles comprising: a first antenna element which is installed perpendicularly on an automobile roof and is 1/4 wavelength long in telephone frequency band and resonates in the telephone frequency band; a second antenna element with its base coupled to the top part of said first antenna element via a shaft supporting assembly which is capable of rotating, said second antenna element together with said first antenna element being 1/4 wavelength long in a FM band and resonating in the FM band; and said first and second antenna elements function in the AM radio reception band; and a trap element for blocking said telephone frequency band, said trap element being interposed between said first and second antenna elements.
Claim 2
Dependent Claim
123 words
A three-band antenna for use in automobiles comprising: a first antenna element which is installed perpendicularly on an automobile roof and is 1/4 wavelength long in telephone frequency band and resonates in the telephone frequency band; a second antenna element with its base coupled to the top part of said first antenna element via a shaft supporting assembly which is capable of rotating, said second antenna element together with said first antenna element being 1/4 wavelength long in a FM band and resonating in the FM band; and said first and second antenna elements function in the AM radio reception band; and a trap element for blocking said telephone frequency band, said trap element being interposed between said first and second antenna elements.
Claim 3
Dependent Claim
30 words
A three-band antenna for use in automobiles according to claim 1 wherein said second antenna element is inclined at an angle with respect to the surface of the automobile roof.
Claim 4
Dependent Claim
36 words
A three-band antenna according to claim 2 further comprising a wave divider coupled to said first antenna element for dividing a signal from said three band antenna into AM/FM frequency band and a telephone frequency band.
References Cited (Backward Citations)
US4115779A
Cited
US4200874A
Cited
US4243989A
Cited
JPS59193602A
Cited
US4675687A
Cited
JPH0298202A
Cited
US4916456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-09-19 | 1998-03-21 | 1998-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-19 | 2002-03-21 | 2002-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-19 | 2006-03-21 | 2006-09-20 | $7700.00 | Window Closed / Lapsed |