Patents by Inventor David H. Funk

David H. Funk 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).

  • Method of determining the effect of a test substance on a clone of a Centroptilum triangulifer mayfly
    Patent number: 5665555
    Abstract: A method of determining the effect of a test substance on any life stage of at least one clone of a Centroptilum triangulifer mayfly comprising (A) identifying and selecting at least one clone of Centroptilum triangulifer as a test clone to be subjected to the test substance; (B) exposing each test clone to the test substance for a predetermined time; and (C) determining the effect of the test substance on each test clone by at least one of (i) observing the test clone for a lethal or sublethal effect and (ii) Sacrificing the test clone, and analyzing the sacrificed test clone for at least one of (a) the presence of at least one of the test substance and any of its metabolites, (b) the quantity of at least one of the test substance and any of its metabolites, and (c) a lethal or sublethal effect of at least one of the test substance and any of its metabolites.
    Type: Grant
    Filed: December 15, 1993
    Date of Patent: September 9, 1997
    Assignee: Academy of Natural Sciences of Philadelphia
    Inventors: Bernard W. Sweeney, David H. Funk, Laurel June Standley
  • Tent
    Patent number: 5261436
    Abstract: A tent frame permits the roof and walls to be separately established, with consequent ease of erection.
    Type: Grant
    Filed: February 16, 1992
    Date of Patent: November 16, 1993
    Inventor: David H. Funk
  • Pentagon tent
    Patent number: D465004
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: October 29, 2002
    Assignee: American Recreation Products, Inc.
    Inventors: David H. Funk, Larry E. Pearcy
  • Pentagon tent
    Patent number: D470559
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: February 18, 2003
    Assignee: American Recreation Products, Inc.
    Inventors: David H. Funk, Larry E. Pearcy
  • Tent having truncated corners
    Patent number: D403041
    Type: Grant
    Filed: March 5, 1997
    Date of Patent: December 22, 1998
    Assignee: American Recreation Products, Inc.
    Inventor: David H. Funk