Patents by Inventor Robert N. Hull

Robert N. Hull 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).

  • "T" post puller-pounder
    Patent number: 5042591
    Abstract: Slide hammer apparatus including means for restraining and non-rotatively driving and pulling fence posts. A handled, hammer section mounts in concentric, sliding relation to a main body which surrounds a fence post and contains upper and lower stops. At least one stop includes an adjustable clamp means and anvil acting pin for securing a post to the main body and permitting reciprocal motion.
    Type: Grant
    Filed: September 18, 1989
    Date of Patent: August 27, 1991
    Inventor: Robert N. Hull
  • Antibiotic compositions
    Patent number: 4379781
    Abstract: Macrolide antibiotics tylosin, spiromycin, cleandomycin, magnamycin, and leucomycin in combination with aminoglycoside antibiotics tobramycin, apramycin, nebramycin 5, gentamicin and neomycin form synergistic compositions which inhibit the growth of mycoplasma in mammalian tissue cultures. Tylosin-apramycin compositions enhance the feed efficiency and weight gain in post weaned pigs and are useful in the control of Pasturella hemolytica an infectious organism in cattle.
    Type: Grant
    Filed: March 9, 1981
    Date of Patent: April 12, 1983
    Assignee: Eli Lilly and Company
    Inventors: Robert N. Hull, Robert S. Gordee