Automatic door for pets

作者： Robert D. Himmer

DOI:

关键词:

摘要: This invention is related to an automatically opening door for pets, mounted in of a building without requiring changes the structure.

参考文章(7)

E Garrison, Pet door panel ,(1973)

Raymond E. Griffith, Animal access door for screen doors ,(1975)

Richard W. Beckett, Marian P. McBride, Michael B. Johnson, Magnetically actuated cat door ,(1976)

M Steinke, Channeled end gate ,(1972)

George A Weible, Electronic door opening device ,(1961)

Robert C Porter, Pet door device ,(1973)

Raghbir C. Goyal, Sliding door operator ,(1974)