Patents Assigned to Doyle Vacuum Cleaner Company
  • Vacuum cleaners
    Patent number: 4072483
    Abstract: A vacuum cleaner for picking up asbestos fibers, and the like, embodying a plurality of filters for affording a "fail-safe" type of protection against the discharge of accumulated materials from the cleaner, and in which the primary filter comprises a bag in which the picked-up material may be collected for subsequent safe and efficient disposal.
    Type: Grant
    Filed: May 20, 1976
    Date of Patent: February 7, 1978
    Assignee: Doyle Vacuum Cleaner Company
    Inventor: Dewey I. Doyle, Jr.