Electronic Scripting Products, Inc. v. HTC America, Inc.
- Richard Seeborg
- 3:17-cv-05806
- U.S. District Court · Northern District of California
- 14
Electronic Scripting Products v. HTC America: Judge Seeborg granted HTC summary judgment, finding ESPI lacked evidence that HTC’s headsets infringed its patent.
Electronic Scripting Products, Inc. and HTC America, Inc.; the ruling resolved ESPI’s patent-infringement claim against HTC in HTC’s favor, and the associated sealing motions were granted.
What happened
In Electronic Scripting Products, Inc. v. HTC America, Inc., ESPI claimed HTC’s virtual-reality headsets infringed a patent covering wearable equipment that detects its position using patterned light sources. The patent required a controller on the wearable equipment to identify a pattern showing the position of its photodetector.
HTC presented evidence that its headsets sent timestamped sensor information to a separate host computer, which calculated the headset’s position. ESPI argued that circuitry on the headsets performed the patent’s required functions, but it did not provide admissible evidence creating a genuine factual dispute.
Judge Richard Seeborg granted HTC’s motion for summary judgment of non-infringement. He ruled that ESPI had not shown the headsets’ onboard circuitry identified the required pattern or that the pattern indicated the photodetector’s position; the associated sealing motions were also granted.
The detailed version
- Electronic Scripting Products, Inc. v. HTC America, Inc. · No. 3:17-cv-05806
- Richard Seeborg
- Jan. 14, 2022
Background
Electronic Scripting Products, Inc. (ESPI) owns U.S. Patent No. 9,235,934, titled “Computer Interface Employing a Wearable Article with an Absolute Pose Detection Component.” HTC America, Inc. made the accused headsets for use with virtual-reality systems sold by former co-defendant Valve, which was voluntarily dismissed.
The patent describes a wearable article that works with predetermined light sources arranged in a known pattern. Claim 1, the only asserted independent claim, requires a photodetector on the wearable article and an onboard controller configured to identify a derivative pattern from photodetector data, with that pattern indicating the photodetector’s position.
The accused products were HTC headsets used in Vive Pro and Vive Pro Eye products. Their position-tracking system included base stations, optical sensors on the headset, and a host personal computer running SteamVR software. The headset circuitry detected and timestamped individual optical signals and sent that information to the host computer. The host computer used reports from multiple sensors to calculate or update the headset’s position.
Parties’ positions and evidence
HTC argued that its headsets did not contain an onboard controller that identified the derivative pattern required by the patent. According to HTC, the headset merely collected and forwarded individual sensor reports, while the separate host computer performed the position calculations. HTC also argued that ESPI had not disclosed admissible evidence supporting its infringement contentions and was bound by its existing discovery response after declining to provide more information.
ESPI argued that an onboard controller performed the patent’s essential functions. It contended that the controller processed timestamps, sensor identities, and pulse widths to identify a timing pattern that indicated the photodetector’s position. ESPI also argued that HTC could not avoid infringement simply because an external computer performed additional calculations.
Legal standard
Summary judgment is appropriate when the record shows no genuine dispute about a material fact and the moving party is entitled to judgment as a matter of law. In a patent case, the court compares the properly interpreted patent claims with the accused product. The patent owner bears the ultimate burden of proving infringement, and the accused infringer may obtain summary judgment by showing that the record lacks evidence supporting an essential element of the infringement claim.
Court’s analysis
The court first held that ESPI had failed to identify admissible evidence sufficient to create a triable issue of fact. HTC had pointed to ESPI’s infringement contentions and its response to an interrogatory seeking all facts supporting those contentions. That response identified no admissible evidence. ESPI did not show that it had obtained additional supporting evidence or that further discovery should be allowed.
The court also ruled that HTC was entitled to summary judgment based on the evidence about how the headsets operated. ESPI did not meaningfully dispute HTC’s factual account or provide competing admissible evidence. The court found that ESPI’s infringement theories exceeded its disclosed contentions and, even assuming those theories could be considered, were not supported.
The court explained that timestamps for individual sensor hits were not a “pattern” under the ordinary meaning of that term. ESPI and its expert did not explain how a timestamp for one hit on one sensor constituted the required pattern. The court also found that ESPI had not shown that the headset circuitry identified a pattern from multiple predetermined light sources or that the alleged pattern indicated the photodetector’s position. The evidence showed that the accused headsets achieved the position-determination result only through the separate host computer, and ESPI had not shown otherwise.
Disposition
The court granted HTC’s motion for summary judgment of non-infringement. A separate judgment was to issue. The associated sealing motions were also granted.
Read the full 14-page opinion on CourtListener, the free public archive maintained by the Free Law Project.