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Douglas Dynamics, LLC v. Buyers Products Company DC CAFC
- 3:09-cv-00261
- W.D. Wis.
- Filed: 04/29/2009
- Closed: 04/21/2014
- Latest Docket Entry: 02/26/2016
- Judge: William Martin Conley
+1
- PACER
1
Plaintiff
1
Defendant
1
Accused
Product
5
Patents-in-Suit
1,819
Days in
Litigation
-
Douglas Dynamics, LLC v. Buyers Products Company DC CAFC
- 3:09-cv-00261
- W.D. Wis.
- Filed: 04/29/2009
- Closed: 04/21/2014
- Latest Docket Entry: 02/26/2016
- Judge: William Martin Conley
+1
- PACER
Causes of Action
Infringement
Willful Patent Infringement
Market Sector
Consumer Products
Referred Judge
Assigned Judge
Outcome Summary
Patent Information
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Validity & Enforceability
Claim # | Claim Text | Outcome |
---|---|---|
28 |
A snowplow and mount assembly comprising: amount frame adapted to be secured to a vehicle having a longitudinal axis; a snowplow frame; one of said mount frame and said snowplow frame having first and second arms and the other of said mount frame and
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|
Valid (102)
Entry 547 Entry 445 |
29 |
The assembly of claim 28 wherein said first and second arms are part of said mount frame and said first and second receivers are part of said snowplow frame.
|
Valid (102)
Entry 547 Entry 445 |
30 |
The assembly of claim 28 wherein said snowplow frame comprises a lift frame and an A-frame pivotally connected to said lift frame on a rearward end of said A-frame.
|
Valid (102)
Entry 547 Entry 445 |
31 |
The assembly of claim 30 further comprising a plow blade mounted on a forward end of said A-frame.
|
Valid (102)
Entry 547 Entry 445 |
35 |
The assembly of claim 28 wherein said first and second latch pins are spring biased toward said latch position.
|
Valid (102)
Entry 547 Entry 445 |
36 |
The assembly of claim 28 or 1 wherein said latch lever is designed to have a mechanical advantage insufficient for an operator to move said latch pins to said unlatched position unless the force due to the weight of said snowplow transferred by said
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|
Valid (102)
Entry 547 Entry 445 |
53 |
A snowplow and mount assembly comprising: a mount frame adapted to be secured to a vehicle having a longitudinal axis; a snowplow frame including a lift frame and an A-frame pivotally connected to said lift frame on a rearward end of said lift frame;
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|
Valid (102)
Entry 547 Entry 445 |
54 |
The assembly of claim 53 further comprising: a spring biasing each said latch pin into said latched position; and a pin extractor associated with each said latch pin and actuatable by said latch lever to extract said latch pin from said aim and
view more
|
Valid (102)
Entry 547 Entry 445 |
55 |
The assembly of claim 53 wherein said first and second arms are part of said mount frame and said first and second receivers are part of said lift frame.
|
Valid (102)
Entry 547 Entry 445 |
56 |
The assembly of claim 53 further comprising a plow blade mounted on a forward end of said A-frame.
|
Valid (102)
Entry 547 Entry 445 |
57 |
A snowplow and mount assembly comprising: a mount frame adapted to be secured to a vehicle having a longitudinal axis; a snowplow frame; one of said mount frame and said snowplow frame having first and second arms and the other of said mount frame
view more
|
Valid (102)
Entry 547 Entry 445 |
58 |
A method of attaching a snowplow frame to a mount frame comprising: providing a mount frame secured to a vehicle having a longitudinal axis and a snowplow frame; one of the mount frame and the snowplow frame having first and second arms and the other
view more
|
Valid (102)
Entry 549 Entry 547 Entry 445 |
59 |
A method of detaching a snowplow frame from a mount frame comprising: providing a mount frame secured to a vehicle having a longitudinal axis and a snowplow frame removably attached to the mount frame; one of the mount frame and the snowplow frame
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|
Valid (102)
Entry 549 Entry 547 Entry 445 |
Claim # | Claim Text | Outcome |
---|---|---|
1 |
For use with a vehicle having a frame and a front bumper, a snow plow assembly, comprising: a mount frame for connection to the vehicle frame behind the bumper, a mount frame for connection to the vehicle frame behind the bumper, a lift assembly
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|
Valid (102 and 103)
Entry 549 Entry 505 |
3 |
The snow plow assembly of claim 1 wherein the releasably connecting means includes a retractable pin.
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Valid
Entry 549 |
4 |
The snow plow assembly of claim 1 including an actuator for raising and lowering the A-frame.
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Valid
Entry 549 |
5 |
The snow plow assembly of claim 4 wherein the lift frame includes a lift arm and an intermediate support, one end of the lift arm pivotally connected to the upper end of the intermediate support, the other end of the lift arm pivotally connected
view more
|
Valid
Entry 549 |
7 |
The snow plow assembly of claim 1 wherein the mount frame includes a pushplate for connecting the lift frame to the mount frame.
|
Valid
Entry 549 |
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Infringement
Buyers Products Company
- 5 Details
Accused Product | Patent # | Claim # | Outcome |
---|---|---|---|
CM seriesHD/EX seriesMD SeriesSnowDoggSnowplow assembliessnowplow assemblies, MD series, HD/EX series, VX series, CM series, XP series, and TE series:TE seriesVX seriesXP series | US 4,999,935 A |
1
|
No infringement
Entry 562Entry 549 Entry 505 Entry 547 |
CM seriesHD/EX seriesMD SeriesSnowplow assembliesSnowplow assemblies MD seriessnowplow assemblies, MD series, HD/EX series, VX series, CM series, XP series, and TE series:TE seriesVX seriesXP series | US 5,353,530 A |
1, 3, 4, 5, 7
|
Infringement
Entry 562Entry 549 Entry 547 Entry 332 |
CM seriesHD/EX seriesMD SeriesSnowplow assembliesSnowplow assemblies MD seriessnowplow assemblies, MD series, HD/EX series, VX series, CM series, XP series, and TE series:TE seriesVX seriesXP series | US 5,420,480 A | All Asserted Claims |
No infringement
Entry 562Entry 549 Entry 547 Entry 332 |
CM seriesHD/EX seriesMD SeriesSnowplow assembliesSnowplow assemblies MD seriessnowplow assemblies, MD series, HD/EX series, VX series, CM series, XP series, and TE series:TE seriesVX seriesXP series | US 6,944,978 B2 |
28, 29, 30, 31, 35, 36, 53, 54, 55, 56, 57, 58, 59
|
Infringement
Entry 562Entry 549 Entry 547 Entry 332 Entry 584 |
CM seriesHD/EX seriesMD SeriesSnowDogg snowplow assemblies.Snowplow assembliesSnowplow assemblies MD seriessnowplow assemblies, MD series, HD/EX series, VX series, CM series, XP series, and TE series:TE seriesVX seriesXP series | US RE35,700 E | All Asserted Claims |
Infringement
Entry 562Entry 549 Entry 732 Entry 547 Entry 332 Entry 611 |
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Damages