1
A Maynard Engebretson, Robert E Morley Jr, Gerald R Popelka: Hearing aids, signal supplying apparatus, systems for compensating hearing deficiencies, and methods. Central Institute for the Deaf, Senniger Powers Leavitt and Roedel, October 22, 1985: US04548082 (151 worldwide citation)

A hearing aid including a microphone for generating an electrical output from sounds external to a user of the hearing aid, an electrically driven receiver for emitting sound into the ear of the user of the hearing aid, and circuitry for driving the receiver. The circuitry drives the receiver in a s ...


2
Jose E Barrera, Andrew B Holbrook, Juan M Santos, Gerald R Popelka: Real-time magnetic resonance imaging and peripheral arterial tone in sleep apnea diagnosis. Lumen Patent Firm, August 27, 2009: US20090216108-A1

Obstructive sleep apnea diagnosis based on peripheral arterial tone (PAT) and real-time magnetic resonance imaging (MRI) is provided. PAT and other physiological data are used to identify respiratory events experienced by a subject with obstructive sleep apnea. MRI images are recorded at least durin ...