Patents by Inventor Sid Hejzlar

Sid Hejzlar 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).

  • Patent number: 4909340
    Abstract: A cordless electronic weighing scale which includes a load receiving element, such as a weighing pan, an electronic circuit including a battery, a load cell operatively attached to the load receiving element for weighing items and generating analog signals representative of items being weighed, an analog-to-digital converter connected with the load cell for receiving analog signals therefrom and converting them into digital signals, a first logic circuit connected between the load cell and the converter to cause analog signals to be transmitted to the converter in an on and off fashion, and a digital display circuit connected to the analog-to-digital converter to provide a digital display of analog signals from the analog-to-digital converter to indicate the weight of the items on the load receiving element. In the system a pulse plus a non-pulse constitutes a cycle and the pulse is about 1% of the cycle and the non-pulse is about 99% of the cycle.
    Type: Grant
    Filed: February 3, 1989
    Date of Patent: March 20, 1990
    Assignee: John Chatillon & Sons Inc.
    Inventors: Emil Kazais, Sid Hejzlar