Patents by Inventor Ewald U. Busch

Ewald U. Busch 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).

  • Attachment for personal protective respirator
    Patent number: 4832011
    Abstract: An attachemnt for use in testing the fit of a personal protective respirator, i.e. a mask, in situ on the face of the user. The attachment is further useful in testing combinations of respirators and filters in the presence of challenge atmospheres in a rapid and efficient manner.
    Type: Grant
    Filed: January 21, 1988
    Date of Patent: May 23, 1989
    Assignee: Innovative Engineering, Inc.
    Inventor: Ewald U. Busch