Patents by Inventor Jan Crha

Jan Crha has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • SYSTEMS, APPARATUSES, AND METHODS FOR IMPROVING POWERED AIR PURIFYING RESPIRATOR
    Publication number: 20230372744
    Abstract: Systems, apparatuses, and methods for reducing temperatures of purified air from air-purifying respirators are provided.
    Type: Application
    Filed: May 16, 2023
    Publication date: November 23, 2023
    Inventors: Daniel James YEE, Alex ROCHAT, Raquel SUAREZ NET, Mark W. PEURIFOY, Raymond Peter HOLDCROFT, Jana BACINSKA, Shulong LI, Kelli HARPER, Robin B. REGAN, Petr LOPUSNIK, Vaclav HRUZA, Jan CRHA, Marie K. HAMMER, Jose Antonio FOSADO RODRIGUEZ, Juan Carlos Adib AUDELO NAVARRO, Taras ANDRUKH, Marlene M. OSTROMECKI, Mark L. OBERPRILLER, Kenneth G. KARLINCHAK, Tyler NIKITAS, Milan RABRENOVIC
  • Motion detector having a bandpass filter
    Patent number: 9874654
    Abstract: A motion detector having a bandpass filter is described herein. One device includes a passive infrared (PIR) sensor configured to generate a signal, and a bandpass filter configured to filter the signal, wherein the bandpass filter comprises a plurality of high pass filters, a plurality of low pass filters, and two operational amplifiers, wherein a portion of the plurality of high pass filters include a capacitor and two resistors.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: January 23, 2018
    Assignee: Honeywell International Inc.
    Inventors: Jiri Sapak, Ludek Zavodny, Roman Cervinka, Jan Crha, Robert Juntunen
  • MOTION DETECTOR HAVING A BANDPASS FILTER
    Publication number: 20170299768
    Abstract: A motion detector having a bandpass filter is described herein. One device includes a passive infrared (PIR) sensor configured to generate a signal, and a bandpass filter configured to filter the signal, wherein the bandpass filter comprises a plurality of high pass filters, a plurality of low pass filters, and two operational amplifiers, wherein a portion of the plurality of high pass filters include a capacitor and two resistors.
    Type: Application
    Filed: April 15, 2016
    Publication date: October 19, 2017
    Inventors: Jiri Sapak, Ludek Zavodny, Roman Cervinka, Jan Crha, Robert Juntunen