httpproxy.gopherspace.dk:75/1/proxy/https://bitsavers.org/pdf/dg/fhp/patents/

       Index of /pdf/dg/fhp/patents
       _______________________________
       
   DIR /pdf/dg/fhp
       pat4428045.pdf
       pat4450523.pdf
       pat4455602.pdf
       pat4471430.pdf
       pat4473881.pdf
       pat4670839.pdf