Patents by Inventor Ralph E. Dennis

Ralph E. Dennis 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).

  • Dennis bag holder
    Patent number: 5275363
    Abstract: Applicant's invention provides a bag holder which enables a ZIPLOC.RTM. type of bag to be held in open position while filling and is adaptable to various sizes of these bags and which invention can be readily used by a single individual.
    Type: Grant
    Filed: March 27, 1992
    Date of Patent: January 4, 1994
    Inventor: Ralph E. Dennis