Patent US5639424A successfully refreshed from Google Patents.
Patent US5970146A successfully refreshed from Google Patents.
US5970146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data encrypted touchscreen
Assignee: Dresser LLC
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Filing: 1997-03-24
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Granted: 1999-10-19
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Expires: 2017-03-24
Abstract
Abstract A secure touchscreen is provided, comprising a touchscreen and touchscreen controller for receiving inputs, a system controller, an encryption module and two external buses. The controller, system controller and encryption module are embedded in a mass of material to prevent unauthorized access of the inputs. Furthermore, the first external bus is used to operate and communicate with an external system in an encrypted mode, while the second external bus is used to operate and communicate with the external system in a normal mode.
Inventors
- 👤 Don Charles McCall
- 👤 David A. Biedermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:50
CPC Classifications
G; G06; G06F; G06F21/00; G06F21/30; G06F21/31; G06F21/36; G06F21/70; G06F21/71; G06F21/72; G06F21/74; G06F21/82; G06F21/83; G06F21/84; G06F21/85; G06F21/86; G06F3/00; G06F3/01; G06F3/03; G06F3/041; G06F3/0416; G06Q; G06Q20/00; G06Q20/08; G06Q20/20; G06Q20/206; G06F2211/00; G06F2211/007; G06F2221/00; G06F2221/21; G06F2221/2105; G06F2221/2143
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
89 words
A secure touchscreen system, comprising; a touchscreen for receiving user inputs; tamper resistant means including a system controller and an encryption module for processing the user inputs, the touchscreen being securely connected to the system controller for passing the user inputs from the touchscreen to the system controller; a first bus connectable to the system controller for receiving the user inputs in a normal mode; and a second bus connectable to the system controller for activating the encryption module and for receiving the user inputs in an encrypted mode.
Claim 2
Dependent Claim
89 words
A secure touchscreen system, comprising; a touchscreen for receiving user inputs; tamper resistant means including a system controller and an encryption module for processing the user inputs, the touchscreen being securely connected to the system controller for passing the user inputs from the touchscreen to the system controller; a first bus connectable to the system controller for receiving the user inputs in a normal mode; and a second bus connectable to the system controller for activating the encryption module and for receiving the user inputs in an encrypted mode.
Claim 3
Dependent Claim
20 words
The system of claim 1 wherein the connection between the system controller and the touchscreen utilizes a stainless steel bus.
Claim 4
Dependent Claim
25 words
The system of claim 1 wherein the first bus is also connectable to the system controller for receiving the user inputs in an encrypted mode.
Claim 5
Dependent Claim
84 words
A secure touchscreen system, comprising; a touchscreen for receiving user inputs; a system controller securely connected to the touchscreen so that a user input coming from the touchscreen can not be easily intercepted; an encryption device securely connected to the system controller so that the user input can be transferred from the system controller to the encryption device without being easily intercepted; and a bus connectable to the system controller for receiving the user inputs in either a normal mode or an encrypted mode.
Claim 6
Dependent Claim
84 words
A secure touchscreen system, comprising; a touchscreen for receiving user inputs; a system controller securely connected to the touchscreen so that a user input coming from the touchscreen can not be easily intercepted; an encryption device securely connected to the system controller so that the user input can be transferred from the system controller to the encryption device without being easily intercepted; and a bus connectable to the system controller for receiving the user inputs in either a normal mode or an encrypted mode.
Claim 7
Dependent Claim
19 words
The system of claim 4 wherein the system controller and the encryption device are secured with an epoxy mass.
Claim 8
Dependent Claim
18 words
The system of claim 4 wherein the system controller and the encryption device are secured with stainless steel.
Claim 9
Dependent Claim
18 words
The system of claim 4 wherein the system controller and the encryption device are secured with tamper-evident label.
Claim 10
Dependent Claim
31 words
The system of claim 4 wherein the system controller and the encryption device are secured by an erase input of the system controller that is activated whenever the system is altered.
Claim 11
Dependent Claim
13 words
The system of claim 1 wherein the system controller includes a touchscreen controller.
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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) | 2002-10-18 | 2003-04-19 | 2003-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-10-18 | 2007-04-19 | 2007-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-10-18 | 2011-04-19 | 2011-10-19 | $7700.00 | Window Closed / Lapsed |