Patents by Inventor Robert L. Stahl

Robert L. Stahl 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).

  • Coupon confining bag method
    Patent number: 4182222
    Abstract: A coupon confining bag method wherein two continuous flexible thermoplastic webs are advanced toward one another for superposition, one web being wider with the narrower web being transparent; the webs are longitudinally sealed along one edge of the narrower web, coupons inserted between the webs transversely, the webs thereupon being longitudinally sealed together along the other edge of the narrower web and the wider web being transversely sealed and severed between adjacent coupons.
    Type: Grant
    Filed: February 16, 1978
    Date of Patent: January 8, 1980
    Inventor: Robert L. Stahl