US4123756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Built-in miniature radio antenna
Assignee: NEC Corp
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Filing: 1977-09-22
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Granted: 1978-10-31
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Expires: 1997-09-22
Abstract
Abstract A miniature radio antenna formed integral with a molded plastic housing comprising a body 1 and a cover 2. The antenna 1', 1", 2', 2" includes sheets, foils or films of electrically conductive metal or coats of conductive paint laid on the inside surfaces of the opposing housing sections, or conductors embedded therein. The antenna is free from adverse acoustic effects due to resonant vibrations in sympathy with a speaker mounted in the housing, and the housing may be molded into any desirable external shape, including fully rounded corners, without increasing the size.
Inventors
- 👤 Koichi Nagata
- 👤 Takashi Oda
- 👤 Koji Yamashita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:15
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/40; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/242; H01Q1/243; H01Q1/36; H01Q1/38; H01Q7/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
100 words
An antenna for a miniature radio of the type having a housing structure formed of plastic material in two sections including a casing member adapted to accommodate a radio circuit and a cover member overlying said casing member, comprising: (a) first and second electrically conductive members provided, respectively, on opposing sections of said housing structure, (b) first means for interconnecting said first and second conductive members at their one ends when said cover member is fitted to said casing member, and (c) second means for connecting said first and second conductive members to said radio circuit at their other ends.
Claim 2
Dependent Claim
100 words
An antenna for a miniature radio of the type having a housing structure formed of plastic material in two sections including a casing member adapted to accommodate a radio circuit and a cover member overlying said casing member, comprising: (a) first and second electrically conductive members provided, respectively, on opposing sections of said housing structure, (b) first means for interconnecting said first and second conductive members at their one ends when said cover member is fitted to said casing member, and (c) second means for connecting said first and second conductive members to said radio circuit at their other ends.
Claim 3
Dependent Claim
31 words
An antenna as set forth in claim 1, wherein said conductive members are sheets of electrically conductive metal attached to the respective inside surfaces of said casing member and cover member.
Claim 4
Dependent Claim
31 words
An antenna as set forth in claim 1, wherein said conductive members are foils of electrically conductive material adhered onto the respective inside surfaces of said casing member and cover member.
Claim 5
Dependent Claim
33 words
An antenna as set forth in claim 1, wherein said conductive members are layers of electrically conductive paint coated or imprinted on the respective inside surfaces of said casing member and cover member.
Claim 6
Dependent Claim
21 words
An antenna as set forth in claim 1, wherein said conductive members are embedded in said casing member and cover member.
Claim 7
Dependent Claim
72 words
An antenna as set forth in claim 1, wherein: (a) said cover member is slidably assembled to said casing member from one end thereof, and (b) said conductive members comprise substantially flat, parallel portions and inwardly projecting end portions at said one ends, whereby said end portions are brought into electrical contact with each other upon the assembly of said cover member to said casing member to thereby form a U-shaped antenna.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |