The California Institute of Technology, also known as Caltech, has filed a legal complaint against Apple and Broadcom, alleging that various Apple products violate some of Caltech's Wi-Fi patents. The school believes that the iPhone 5 and newer, along with other devices utilizing Broadcom Wi-Fi hardware, infringe on four of its patents relating to encoding and decoding

Caltech files suit against Apple over Wi-Fi technology patents

From Patently Apple (via MacRumors):

The formal complaint's mention of Apple states in-part that "Apple manufactures, uses, imports, offers for sale, and/or sells Wi-Fi products that incorporate IRA/LDPC encoders and/or decoders and infringe the Asserted Patents. Apple products that incorporate IRA/LDPC encoders and/or decoders and infringe the Asserted Patents include, but are not limited to, the following: iPhone 6S, iPhone 6S Plus, iPhone 6, iPhone 6 Plus, iPhone 5C, iPhone 5S, iPhone 5, iPad Air, IPad Air 2, iPad Pro, iPad Mini 4, iPad Mini 3, iPad Mini 2, MacBook Air, Apple Watch" and other products.

Caltech's is the latest lawsuit brought against Apple for the technology in its products. The company is in an ongoing battle with patent holder VirnetX over technology behind FaceTime and iMessage.