United States Patent 2989920
Inventors:
Kendall, James M.
Publication Date:
06/27/1961
Assignee:
Kendall, James M.
Other Classes:
102/227, 102/226, 102/392, 102/252
International Classes:
F42C14/04; F42C15/295; F42C14/00; F42C15/00
Foreign References:
| GB191512800A | | | | |
| FR478057A | | | | |
| DE316269C | | | | |
| IT352877B | | | | |