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Technology Licensing Corporation v. Videotek, Inc. DC
- 5:01-cv-04204
- N.D. Cal.
- Judge: Richard Seeborg +1
- Filed: 11/09/2001
- Closed: 01/29/2009
- Latest Docket Entry: 04/16/2012
- PACER
- Docket updated daily
1
Plaintiff
1
Defendant
1
Accused
Product
4
Patents-in-Suit
2,639
Days in
Litigation
-
Technology Licensing Corporation v. Videotek, Inc. DC
- 5:01-cv-04204
- N.D. Cal.
- Judge: Richard Seeborg +1
- Filed: 11/09/2001
- Closed: 01/29/2009
- Latest Docket Entry: 04/16/2012
- PACER
- Docket updated daily
Causes of Action
Other
Willful Patent Infringement
Assigned Judge
Outcome Summary
- Patent Information
-
Validity & Enforceability
Claim # | Claim Text | Outcome |
---|---|---|
33 |
The method of recovering sync from a video type signal including the steps of: a) coupling said video type signal through a capacitor or other circuit thereby establishing a level shifted signal having a sync portion; b) comparing said level
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Enforceable and Invalid (102)
Entry 931 |
34 |
The method as recited in claim 33 wherein in step c) said sync portion is clamped to a known D.C. level thus providing sync tip clamping of said level shifted signal.
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Enforceable and Invalid (102)
Entry 931 |
35 |
The method as recited in claim 33 wherein in step c) a first substantially constant current is taken from said level shifted signal and a second current is added to said level shifted signal through a diode in response to said compared signal
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Enforceable and Invalid (102)
Entry 931 |
36 |
The method as recited in claim 33, 34 or 35 wherein in step d) said second known reference is established at substantially the 50% level of said sync portion.
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Enforceable and Invalid (102)
Entry 931 |
37 |
The method as recited in claim 33, 34 or 35 wherein step d) includes measuring at least one of the highest or lowest level of said sync portion as part of establishing said second known reference.
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Enforceable and Invalid (102)
Entry 931 |
39 |
The method as recited in claim 33, 34 or 35 including the further steps: e) in response to said second compared signal of d), generating an adjustable window signal; f) comparing said second compared signal of d) to said window signal and
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Enforceable and Invalid (102)
Entry 931 |
Claim # | Claim Text | Outcome |
---|---|---|
27 |
An apparatus for deriving a logic level version of the sync portion of a video type signal, said sync portion having a plurality of levels, one of which may be a blanking level, said apparatus including: circuitry responsive to said sync portion
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Enforceable and Valid
Entry 931 |
28 |
An apparatus as claimed in claim 27 wherein in said circuitry for clamping the sync tip to a known level, said known level is established by one or more semiconductor junction voltage drops.
|
Enforceable and Valid
Entry 931 |
29 |
An apparatus as claimed in claim 27 or 28 wherein one said reference signal is responsive to the level of the blanking level of said second clamped sync portion.
|
Enforceable and Valid
Entry 931 |
31 |
An apparatus for deriving a logic level version of the sync portion of a video type signal, said sync portion having a number of levels N, one of which may be a blanking level, and where N may be two or more depending on the format of said video
view more
|
Enforceable and Valid
Entry 931 |
32 |
An apparatus as claimed in claim 31 wherein one said reference signal is responsive to the level of said sync portion which has the level closest to the peak white value of said video type signal.
|
Enforceable and Valid
Entry 931 |
40 |
A method for processing a sync portion of a video type signal, said sync portion having a plurality of levels, comprising steps to: a) a first separation of said sync portion to generate a first separated sync signal, including clamping the sync
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Enforceable and Valid
Entry 931 |
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Infringement
Videotek Incorporated
- 2 Details
Accused Product | Patent # | Claim # | Outcome |
---|---|---|---|
Signal Synchronization | US 5,486,869 A |
27, 28, 29, 31, 32, 40
|
Infringement
Entry 931
|
Signal Synchronization | US 5,754,250 A |
33, 34, 35, 36, 37, 39
|
No infringement
Entry 931
|