1
David E Albert, Landgrave T Smith, Carl J Rieger, Colin J Cumming, Leslie D Hoy: Method and hand-held apparatus for demodulating and viewing frequency modulated biomedical signals. Data Critical, Dougherty & Hessin P C, April 7, 1998: US05735285 (319 worldwide citation)

Method and apparatus for transmission of biomedical waveform data from a patient to an attending physician wherein the waveform data audio signal is frequency modulated for subsequent wireline or wireless transmission to a remote hand-held computer that functions to digitize, record and demodulate t ...


2
David E Albert, James J Lewis, Landgrave T Smith: Supplemental alert generation device with speaker enclosure assembly. InnovAlarm Corporation, Knobbe Martens Olson & Bear, October 15, 2013: US08558708 (13 worldwide citation)

A battery-powered supplemental alert generator is disclosed that is adapted to be mounted in close proximity to, such as within 3 or 4 feet of, a conventional smoke, heat and/or fire detector/alert device. The supplemental alert generator operates in a relatively low power mode while listening for t ...


3
Leslies D Hoy, David E Albert, Landgrave T Smith, James J Lewis: Signal processing system and methods for reliably detecting audible alarms. InnovAlarm Corporation, Knobbe Martens Olson & Bear, September 18, 2012: US08269625 (10 worldwide citation)

A signal processing system and associated methods are disclosed for reliably detecting audible alert signals, such as Temporal-3 (or Code-3) and Temporal-4 (or Code-4) alert signals generated by commercially available smoke, fire, and carbon monoxide detectors. The system and methods are capable of ...


4
David E Albert, James J Lewis, Landgrave T Smith: Supplemental alert generation device for retrofit applications. InnovAlaem Corporation, Knobbe Martens Olson & Bear, August 14, 2012: US08242899 (8 worldwide citation)

A battery-powered supplemental alert generator is disclosed that is adapted to be mounted in close proximity to, such as within 3 or 4 feet of, a conventional smoke, heat and/or fire detector/alert device. The supplemental alert generator operates in a relatively low power mode while listening for t ...


5
Landgrave T Smith, James J Lewis, David E Albert: Speaker enclosure design for efficiently generating an audible alert signal. InnovAlarm Corporation, Knobbe Martens Olson & Bear, September 3, 2013: US08525689 (7 worldwide citation)

Various inventive features are disclosed for efficiently generating regulation-compliant audible alerts, including but not limited to 520 Hz square wave alert/alarm signals, using an audio speaker. One such feature involves the use of a non-linear amplifier in combination with a voltage boost regula ...


6
David E Albert, James J Lewis, Landgrave T Smith: Supplemental alert generation device. InnovAlarm Corporation, Knobbe Martens Olson & Bear, August 7, 2012: US08237577 (6 worldwide citation)

A battery-powered supplemental alert generator is disclosed that is adapted to be mounted in close proximity to, such as within 3 or 4 feet of, a conventional smoke, heat and/or fire detector/alert device. The supplemental alert generator operates in a relatively low power mode while listening for t ...


7
David E Albert, James J Lewis, Landgrave T Smith: Supplemental alert generation device. Innovalarm Corporation, Knobbe Martens Olson & Bear, November 17, 2015: US09189929

A battery-powered supplemental alert generator is disclosed that is adapted to be mounted in close proximity to, such as within 3 or 4 feet of, a conventional smoke, heat and/or fire detector/alert device. The supplemental alert generator operates in a relatively low power mode while listening for t ...


8
Landgrave T Smith, James J Lewis, David E Albert: Speaker enclosure design for efficiently generating an audible alert signal. InnovAlarm Corporation, Knobbe Martens Olson & Bear, September 30, 2014: US08847779

Various inventive features are disclosed for efficiently generating regulation-compliant audible alerts, including but not limited to 520 Hz square wave alert/alarm signals, using an audio speaker. One such feature involves the use of a non-linear amplifier in combination with a voltage boost regula ...


9
James J Lewis, Landgrave T Smith, David E Albert: System and method for efficiently generating audible alarms. Innovalarm Corporation, April 28, 2011: US20110095896-A1

Various inventive features are disclosed for efficiently generating regulation-compliant audible alerts, including but not limited to 520 Hz square wave alert/alarm signals, using an audio speaker. One such feature involves the use of a non-linear amplifier in combination with a voltage boost regula ...


10
Landgrave T Smith, James J Lewis, David E Albert: Speaker enclosure design for efficiently generating an audible alert signal. Innovalarm Corporation, April 28, 2011: US20110095900-A1

Various inventive features are disclosed for efficiently generating regulation-compliant audible alerts, including but not limited to 520 Hz square wave alert/alarm signals, using an audio speaker. One such feature involves the use of a non-linear amplifier in combination with a voltage boost regula ...