Patents by Inventor Rolf G. Engstrom

Rolf G. Engstrom 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).

  • Publication number: 20030037192
    Abstract: A point-of-sale (POS) device includes a main body and a communication module. The main body includes a main circuit for performing point-of-sale functions and an interface having a port in communication with the main circuit and a physical connection apparatus. The communication module includes a modem circuit for operating in accordance with a modem protocol and an interface. The interface of the communication module has a port in communication with the modem circuit and for connecting to the port of the interface of the main body, and a physical connection apparatus for releasably engaging with the physical connection apparatus of the interface of the main body. The interface of the communication module is configured to be complementary with the interface of the main body such that when the physical connection apparatus are engaged, the ports are connected.
    Type: Application
    Filed: August 15, 2001
    Publication date: February 20, 2003
    Inventor: Rolf G. Engstrom
  • Patent number: 4734288
    Abstract: A package for an expandable food product and a method for manufacturing the same including an outer container, an expandable food pouch within the container and a coating on the inside surface of the container to adhere the pouch thereto when the package is exposed to a source of heat. A further embodiment of the package includes an expandable food pouch with a designed fault along its peripheral edge to facilitate the controlled release of pressure formed within the pouch.
    Type: Grant
    Filed: April 10, 1987
    Date of Patent: March 29, 1988
    Assignee: E. A. Sween Company
    Inventors: Rolf G. Engstrom, Douglas M. Fincham