Summary
The United States Court of Appeals for the Federal Circuit affirmed summary judgment of noninfringement in favor of Hulu concerning claim 16 of Sound View’s U.S. Patent No. 6,708,213. The court held that claim 16 does not require a specialized buffer but does require the steps of receiving a request and then allocating a buffer to be performed in that order.
Topics
Practice areas
Questions Presented
- Whether claim 16 of the ’213 patent requires a specialized buffer associated exclusively with a single requested streaming-media object.
- Whether the first two limitations of method claim 16 must be performed in the order in which they appear.
- Whether summary judgment of noninfringement was proper when the accused products did not perform the claim limitations in the required sequence.
Holdings
- Claim 16 does not require a specialized buffer dedicated to or associated exclusively with a single streaming-media object; the term "buffer" retains its plain and ordinary meaning of temporary storage for data being sent or received.
- Claim 16 requires the first limitation—receiving a request for a streaming-media object—to be performed before the second limitation—allocating a buffer to cache the requested object.
- Summary judgment of noninfringement was proper because the accused products did not perform claim 16's first two limitations in the required sequence, an independent ground supporting judgment for Hulu.
Key quotations
“We disagree that claim 16 requires a specialized buffer.” (8)
“Here, both the grammar and logic of claim 16 require the first limitation to be performed before the second.” (10-11)
“In other words, implicit ordering exists when there are inherent logical dependencies or functional relationships between the recited steps of a method claim.” (14)
“Because the accused products do not perform the claim limitations in the required sequence, they do not infringe claim 16 of the ’213 patent.” (15)
Factual background
The ’213 patent claims a method for reducing latency in streaming multimedia networks using helper servers, buffers, and concurrent data retrieval and downloading. Sound View alleged that Hulu directed third-party edge servers to perform the steps of claim 16, including allocating a buffer, sending part of a requested video, and concurrently retrieving another part. The accused products did not perform the first two claim limitations in the required sequence, and the district court also found that their general-purpose buffers did not satisfy its specialized-buffer construction.
Procedural history
Sound View sued Hulu in 2017, alleging infringement of six patents. After claim construction, the district court granted summary judgment of noninfringement; the Federal Circuit previously affirmed relevant claim constructions, vacated the summary judgment order, and remanded for an affirmative construction of "buffer." On remand, the district court construed "buffer," later determined that claim 16 required the first two limitations to be performed in sequence and required a specialized buffer, and again granted summary judgment to Hulu. The Federal Circuit held that the specialized-buffer construction was erroneous but affirmed because the required ordering of the first two steps independently supported noninfringement.