Yufa v. Hach Ultra Analytics, Inc.

629 F. App'x 983
CourtCourt of Appeals for the Federal Circuit
DecidedNovember 5, 2015
Docket2015-1626
StatusUnpublished

This text of 629 F. App'x 983 (Yufa v. Hach Ultra Analytics, Inc.) is published on Counsel Stack Legal Research, covering Court of Appeals for the Federal Circuit primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Yufa v. Hach Ultra Analytics, Inc., 629 F. App'x 983 (Fed. Cir. 2015).

Opinion

PER CURIAM.

Dr. Aleksandr Yufa appeals from a district court’s grant of summary judgment in favor of Hach Ultra Analytics, Inc., (“Hach”) on both Dr. Yufa’s patent infringement and emotional distress claims. Because we find no error in the district court’s decision, we affirm.

BACKGROUND

Dr. Yufa is inventor and owner of U.S. Patent Nos. 6,034,769 and 6,346,983. Both patents claim methods and devices for determining the number and size of particles in fluids. Dr. Yufa, acting on his- own behalf as a pro se litigant, has asserted the '769 and '983 patents against a number of parties, resulting in three prior appeals to this court. 1

*984 Dr. Yufa’s patents describe prior art particle detectors that use light scattering techniques. See '769 patent, 2:4-13; '983 patent, 2:8-28. Light scattering detectors shine light through a fluid sample containing particles of various sizes. As light hits a particle, the light scatters, or reflects off the particle. The amount of light scattered is related to the number and size of particles in the sample. A sensor measures the intensity of the scattered light and outputs an analog electrical current with a voltage proportional to the measured intensity. The current is then amplified and processed into a digital signal to determine the number and size of particles in the sample.

The prior art detectors described in Dr. Yufa’s patents use a well-known method to process the (amplified) analog electrical current into a digital signal that represents the number and size of particles in the sample. The method involves comparing the analog current voltage with a reference voltage that corresponds to a particular particle size. See '769 patent, 3:3-16; '983 patent, 2:18-29. If the detector’s voltage output exceeds the reference voltage, indicating that a particle size is larger than the size corresponding to the reference voltage, the detector outputs a digital value of “true.” If the detector’s voltage output falls below the reference voltage, indicating that a particle size is smaller than the size corresponding to the reference voltage, the detector outputs a digital value of “false.” The number of “true” values thus reflects the number of particles with sizes exceeding the size corresponding to the reference voltage. By using multiple reference voltages at different levels (corresponding to different particle sizes), the detector can count the number of particles within different size ranges.

Dr. Yufa’s patents discuss problems with using an analog reference voltage. According to the '983 patent, for example, reference voltage methods “create an insufficient signal to noise ratio, thereby limiting the sensitivity and efficiency of the ... devices.” '983 patent, 3:26-28. The '769 patent explains that this “non-precise analog method of comparison” cannot provide “sufficiently high sensitivity” to meet “increasing environmental requirements.” '769 patent, 3:16-18. The methods and devices claimed in '769 and '983 patents are described as an improvement over the prior art.

A. Dr. Yufa’s Lockheed Martin Suit and Reexamination

In June 2006, Dr. Yufa sued Lockheed Martin in the Central District of California, alleging infringement of certain claims of the '769 and '983 patents. Lockheed Martin requested that the United States Patent and Trademark Office (PTO) reexamine all claims in the '769 and '983 patents. The PTO ordered reexamination in February 2007, and in March 2007, the district court stayed proceedings pending the PTO’s determination.

Certain claims of both patents survived reexamination. To overcome prior art rejections made during reexamination, however, Dr. Yufa amended claims of each patent to require that the particle detector not use a reference voltage. Method claim 1 of the '769 patent was amended to recite the step of “converting each amplified signal to a digital form ... without using a reference voltage_” J.A. 82 ('769 patent reexamination certificate) (emphasis to amendment in original). Claims 4-6 were *985 similarly amended. Surviving apparatus claims 6-8 of the '983 patent were amended to require “conversion of each of said voltage value signals to a digital form pulse without using a reference voltage to convert each of said voltage value signals.” J.A. 54 (’983 patent reexamination certificate) (emphasis to amendment in original). The district court action resumed, and Dr. Yufa amended his complaint to allege infringement of the reexamined claims.

In October 2013, Lockheed Martin moved for summary judgment of nonin-fringement with respect to all accused products. This motion was based in part on Lockheed Martin’s argument that the evidence could not support a finding of infringement because certain accused products did not operate without a reference voltage, as claims of the '769 and '983 patents require. After reviewing these accused products, the district court agreed with Lockheed Martin, finding that the relevant products use a reference voltage to convert analog current into a digital signal. The district court granted the motion for summary judgment on December 23, 2013, and entered final judgment on January 23, 2014. Dr. Yufa appealed, and this court affirmed the district court’s decision in a nonprecedential opinion. Yufa, 575 F. App’x at 881.

B. Dr. Yufa’s Parallel Suit Against . Hach

On March 5, 2009, Dr. Yufa filed a parallel suit against Hach in the District of Oregon, again alleging infringement of the '769 and '983 patents. As in the Lockheed case, the district court stayed the action pending PTO reexamination proceedings. Once the district court action resumed, Dr. Yufa amended his complaint to allege in-' fringement of claims surviving reexamination, i.e., claims 1 and 4-6 of the '769 patent and claims 6-8 of the '983 patent. Dr. Yufa accused Hach particle counters sold under the MET ONE brand (all models in the R4500 series, the R4803, R4805, R4815, R4903, R4905, R4915, and all models in the 7000 series) and particle counters sold under the HIAC brand (the PM4000, 8000A, and 9705), as well as two other devices known as the HLRD series and the MicroCount 05. Dr. Yufa also alleged emotional distress caused by Hach allegedly misrepresenting his achievements as its own achievements.

Hach moved for summary judgment on all of Dr. Yufa’s claims. To support this motion, Hach submitted a declaration by Kenneth Girvin, a senior optical engineer at Hach. Mr. Girvin stated that each of the accused particle counters sold under the MET ONE and HIAC brands uses “a predetermined reference voltage as part of the process of converting a light detector’s amplified output into a digital signal.” J.A. 385, 387. As for the HLRD series and MicroCount 05, Mr. Garvin stated in his declaration that these products are optical sensors, not particle counters. J.A. 388.

On the basis of Mr. Girvin’s declaration, Hach argued that the evidence could not support a finding of infringement or emotional distress.

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