Canon lost trail in patent infringement cause (sensor technology)

Canon Lost Trail In Patent Infringement Cause (sensor Technology)

Company Intellectual Ventures accused Canon of patent infringement. Canon lost. Two image sensor patents are concerned: US6,221,686 “Method of making a semiconductor image sensor” and US6,023,081 “Semiconductor image sensor.”

Delaware Intellectual Property Litigation published a document with the motivations (see pages 11-19).

By Memorandum Opinion entered by The Honorable Sue L. Robinson in Intellectual Ventures I, LLC, et al. v. Canon Inc., et al., Civil Action No. 11-792-SLR (D.Del., May 18, 2015), the Court granted plaintiff’s alternative motion for a new trial regarding infringement of U.S. Patent Numbers 6,121,960 (“the ‘960 patent”) and 5,754,348 (“the ‘348 patent”) after concluding that defense counsel in his closing argument improperly played the role of expert witness by inferring from factual testimony that the accused devices did not meet the claim limitations arguments.  The court found such argument to be contrary to a pre-trial agreement that defendant would not present any evidence of non-infringement, including evidence of a lack of a subjective intent to infringe, particularly given that the Court previously barred certain testimony from plaintiff’s witnesses on the topic during the trial.

[via Image Sensors World]

[CW3] Canon EF 16-35mm f/2.8 Mark III in the works? Canon patent for 16-35mm f/2.8 lens spotted


embodiment: 16-35mm f/2.8

Last week I got a rumor I didn’t take seriously. The rumor suggested that Canon is working on a new version of the highly popular EF 16-35mm f/2.8L II USM lens. Well. I think I was wrong in not trusting the source. The EF 16-35mm f/2.8L II USM was released in 2007, so a replacement is not out of the realm of possibilities. Given the patent, I rate the rumour CW3.

Egami (translated) spotted a patent that appears to support the rumour of a EF 16-35mm f/2.8 Mark III lens.

  • Patent Publication No. 2014-206674
    • Published 2014.10.30
    • Filing date 2013.4.15
  • Example 1
    • Zoom ratio 2.06
    • Focal length f = 16.49-23.74-33.94mm
    • Fno. 2.91
    • Half angle of view ω = 52.69-42.35-32.51 °
    • BF 38.74-48.38-63.65mm

EF 16-35mm f/2.8L II USM

About our rumour rating:

  • CW1 – probably fake rumor, not reliable (less than 15% chance to be real)
  • CW2 – rumor from an unknown/new source, but otherwise at least a plausible rumor (15%-40% chance to be real)
  • CW3 – around 50% chance to be real, coming from a known source, or from new source with good insight in Canon’s business
  • CW4 – rumor from a known source that was right in the past, high probability to be true (60%-80% chance to be real)
  • CW5 – as good as certain to be true

A new EF-S 15-85mm f/3.5-5.6 STM coming (next APS-C kit lens)?


EF-S 15-85mm f/3.5-5.6

Egami (translated) spotted a patent filed by Canon for an EF-S 15-85mm f/3.5-5.6 lens. This lens will replace the EF-S 15-85mm f/3.5-5.6 IS (released 2009). We got some rumors saying that this lens will come with STM on board. Egami itself suggests it could be the next kit lens for Canon’s high-end APS-C bodies.

Machine translated patent description:

  • Patent Publication No. 2015-75570
    • Published 2015.4.20
    • Filing date 2013.10.8
  • Example
    Example Zoom ratio Focal length Fno. Half angle Image height Overall length BF
    One 4.61 18.00 27.48 83.00 4.00 4.58 5.80 37.1 26.3 9.3 13.6 133.1 140.0 160.0 37.1 41.6 50.3
    Two 4.88 17.00 26.34 83.00 3.99 4.49 5.80 38.66 27.31 9.31 13.6 127.12 133.64 154.74 35.00 39.12 48.89
    Three 5.28 15.50 22.82 81.84 3.60 4.10 5.85 41.39 30.91 9.48 13.66 128.40 134.55 169.41 35.48 43.51 66.65
    Four 5.26 15.60 22.19 82.00 3.50 3.97 5.84 41.21 31.62 9.46 13.66 128.18 134.63 171.19 36.37 43.38 67.86

    Image height Y = 21.63mm

  • Canon patents
    • Positive and negative grain positive and negative positive 5-group configuration (Examples 1 and 2)
    • 4-group configuration of positive and negative grain-positive-positive (Examples 3 and 4)
    • Inner focus (the second group)

EF-S 15-85mm f/3.5-5.6 IS



Canon patent for 12-35mm f/2-3.5 IS lens for 4/3 formats


Egami (translated) spotted a patent filed by Canon for an image-stabilized 12-35mm f/2-3.5 lens for 4/3 sensors. Slow down before you get too excited figuring out that Canon will soon produces lenses for 4/3 systems. If this patent will ever hot the market it could also be for a compact camera, or one of the better Powershot cams.

  • Canon patent
    • Positive and negative positive and negative positive five-group zoom
    • Rear focus (fourth group)
    • Anti-vibration (part of the third group)


Canon Patent for 35mm f/1.4 lens (EF 35mm f/1.4 Mark II?)


Egami (translated) spotted a patent filed by Canon, for a 35mm f/1.4 lens.

The EF 35mm f/1.4 is rumoured to get replaced soon. The patent may well refer to the upcoming 35mm lens.

  • Patent Publication No. 2015-72370
    • Published 2015.4.16
    • Filing date 2013.10.3
  • Example 1
    • Focal length f = 35.47mm
    • Fno. 1.45
    • Half angle of view ω = 31.38 °
    • Image height Y = 21.64mm
    • Lens length 141.37mm
    • BF 39.37mm
    • Positive, positive ShiboTadashi

Sigma patent for 400mm f/2.8 OS Sport Lens


Egami (translated) spotted an interesting patent filed by Sigma. It refers to a 400mm f/2.8, image-stabilized lens. This lens will be part of Sigma’s “Sport” line-up.

  • Patent Publication No. 2015-64436
    • Published 2015.4.9
    • Filing date 2013.9.4
  • Example 1
    • Focal length 390.00mm
    • Fno. 2.91
    • Total angle of view 2ω 6.29 °
    • Image height Y 21.63mm
    • Overall length of the lens 353.00mm
    • Positive, positive positive and negative negative 5-group configuration
    • Inner Focus (fourth group)
    • Anti-vibration (part of the fifth group)