Patents by Inventor John A. Crispin

John A. Crispin 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).

  • High flow calibration test point
    Patent number: 7543796
    Abstract: A high flow calibration test point has entry, inlet, and outlet ports and a spring-biased plunger that in one position provides communication between the entry port and both the inlet and outlet ports, in another position provides communication between the entry port only with the outlet port, and in yet another position allows communication only between the inlet and outlet ports.
    Type: Grant
    Filed: July 14, 2006
    Date of Patent: June 9, 2009
    Assignee: Wabtec Holding Corporation
    Inventors: James T. Dewberry, Robert N. Scharpf, John A. Crispin
  • High flow calibration test point
    Publication number: 20080121291
    Abstract: A high flow calibration test point has entry, inlet, and outlet ports and a spring-biased plunger that in one position provides communication between the entry port and both the inlet and outlet ports, in another position provides communication between the entry port only with the outlet port, and in yet another position allows communication only between the inlet and outlet ports.
    Type: Application
    Filed: July 14, 2006
    Publication date: May 29, 2008
    Applicant: Wabtec Holding Corporation
    Inventors: James T. Dewberry, Robert N. Scharpf, John A. Crispin