Here are a few more patents, most of which I have not seen posted here [on the mailing list] or at the Leading Edge patent page.
I wonder if Clinton's new hearing aids have devices like the first patent describes built in?
United States Patent 5,627,521
Olsen, et. al. May 6, 1997
Personal microwave and radio frequency detector
Abstract
A self-contained personal microwave and RF detector, which includes, inter alia, the housing and associated electronics of a standard hearing aid, is configured to produce an audible indication to a wearer thereof in response to electromagnetic fields of dangerously high levels within predetermined frequency ranges.
United States Patent 5,392,788
Hudspeth Feb. 28, 1995
Abstract
A system for acquisition and decoding of EP and SP signals is provided which comprises a transducer for presenting stimuli to a subject, EEG transducers for recording brainwave signals from the subject, a computer for controlling and synchronizing stimuli presented to the subject and for concurrently recording brainwave signals, and either interpreting signals using a model for conceptual perceptional and emotional thought to correspond EEG signals to thought of the subject or comparing signals to normative EEG signals from a normative population to diagnose and locate the origin of brain dysfunctional underlying perception, conception, and emotion.
United States Patent 4,940,058
Taff, et. al. Jul. 10, 1990
Cryogenic remote sensing physiograph
Abstract
Apparatus and method for remotely detecting super-low frequency (SLF) and extremely-low frequency (ELF) signals eminating from human subjects. The SLF/ELF signals are composed of various wavelengths and amplitudes which correspond to the subjects internal physiological processes. The apparatus includes: a supercooled multi-plate arrayed antenna for detecting the SLF/ELF signals; an analogsignal conditioner unit adapted to filter out signals having a frequency of greater than 40 Hertz; and a digital signal processor unit adapted to perform Fast Fourier Transform and autocorrelation signal analyses for separating signal wavelengths and amplitudes which correspond to the internal physiological processes and represent EKG, EEG, EMG, EOG and respiration measurements.
United States Patent 4,717,343
Densky Jan. 5, 1988
Method of changing a person's behavior
Abstract
A method of conditioning a person's unconscious mind in order to effect a desired change in the person's behavior which does not require the services of a trained therapist. Instead the person to be treated views a program of video pictures appearing on a screen. The program as viewed by the person's unconscious mind acts to condition the person's thought patterns in a manner which alters that person's behavior in a positive way.
United States Patent 5,649,061
Smyth Jul. 15, 1997
Device and method for estimating a mental decision
The search features at the patent office's web site are very nicely done and easy to use. Here are couple more links, found by a boolean search on "microwave and hearing" and which describe microwave voice projection devices: