US5054056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tamper-deterrent device
Assignee: AT&T Delaware Intellectual Property Inc
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Filing: 1990-08-29
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Granted: 1991-10-01
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Expires: 2010-08-29
Abstract
Abstract The present invention is directed toward deterring modification of a telephone unit by drilling by inserting a drill guard in the drilling path or axis such that the drill guard defines a surface portion in the drill path or axis at a deflection angle sufficient to prevent drilling due to deflection of the drill.
Inventors
- 👤 William H. Blythe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:29
CPC Classifications
H; H04; H04M; H04M17/00; H04M17/02; H04M17/026; G; G07; G07F; G07F9/00; G07F9/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
55 words
A device for restricting a drilling process along a drill axis, said device comprising a deflecting member defining a deflecting surface portion intersecting said drill axis at a drill deflection angle sufficient to cause the leading point of said drill to be deflected along said surface portion and not to pass through said surface portion.
Claim 2
Independent Claim
55 words
A device for restricting a drilling process along a drill axis, said device comprising a deflecting member defining a deflecting surface portion intersecting said drill axis at a drill deflection angle sufficient to cause the leading point of said drill to be deflected along said surface portion and not to pass through said surface portion.
Claim 3
Dependent Claim
15 words
The device as claimed in claim 1, wherein said deflecting surface portion is substantially planar.
Claim 4
Dependent Claim
16 words
The device as claimed in claim 2, wherein said deflecting member is fabricated from stainless steel.
Claim 5
Dependent Claim
19 words
The device as claimed in claim 3, wherein said deflecting member is fabricated from a sheet of stainless steel.
Claim 6
Dependent Claim
13 words
The device as claimed in claim 3, wherein said surface portion is polished.
Claim 7
Dependent Claim
16 words
The device as claimed in claim 1, wherein said deflecting member is fabricated from stainless steel.
Claim 8
Dependent Claim
13 words
The device as claimed in claim 6, wherein said surface portion is polished.
Claim 9
Independent Claim
93 words
A device for restricting a drilling process along a drill axis into a telephone unit in order to gain access to and deflect a flapper therein, said drill axis intersecting a coin return chute positioned within said telephone unit, said device comprising a deflecting member positioned within the throat of said coin return chute and defining a deflecting surface portion intersecting said drill axis at a drill deflection angle sufficient to cause the leading point of said drill to be deflected along said surface portion and not to pass through said surface portion.
Claim 10
Independent Claim
93 words
A device for restricting a drilling process along a drill axis into a telephone unit in order to gain access to and deflect a flapper therein, said drill axis intersecting a coin return chute positioned within said telephone unit, said device comprising a deflecting member positioned within the throat of said coin return chute and defining a deflecting surface portion intersecting said drill axis at a drill deflection angle sufficient to cause the leading point of said drill to be deflected along said surface portion and not to pass through said surface portion.
Claim 11
Dependent Claim
15 words
The device as claimed in claim 8, wherein said deflecting surface portion is substantially planar.
Claim 12
Dependent Claim
16 words
The device as claimed in claim 9, wherein said deflecting member is fabricated from stainless steel.
Claim 13
Dependent Claim
19 words
The device as claimed in claim 10, wherein said deflecting member is fabricated from a sheet of stainless steel.
Claim 14
Dependent Claim
13 words
The device as claimed in claim 11, wherein said surface portion is polished.
Claim 15
Dependent Claim
16 words
The device as claimed in claim 8, wherein said deflecting member is fabricated from stainless steel.
Claim 16
Dependent Claim
13 words
The device as claimed in claim 13, wherein said surface portion is polished.
References Cited (Backward Citations)
US4248336A
Cited
US4966325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |