United States of America Patent Nr. 2,719,879
From the series
Copyright information
Original from
Private estate of Anton Marian Springer
Copyright holder
Name
Anton Marian Springer
Contact details
Anton Marian Springer
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CC-BY-SA Users may share and adapt this material, even for commercial purposes. Appropriate credit must be given and an indication included if changes were made. Adapted versions must be distributed under the same license as original.
Digitization by
Max Planck Institute for the History of Science
Digitization Copyright
Max Planck Institute for the History of Science
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CC-BY-SA Users may share and adapt this material, even for commercial purposes. Appropriate credit must be given and an indication included if changes were made. Adapted versions must be distributed under the same license as original.