Dr. R Pohlman

"Pohlman, Dr. R." (original file title). Contents: Copy of patent for invention 'Improvements in methods and apparatus for revealing inclusions in an opaque medium' belonging to Pohlman (1938). Notes and photos re: device that forms images by supersonic wavelength (no dates). Letters from Pohlman to Epstein (one dated 1946)

mid 20th century

1 file