At 07:31 PM 2/22/2011, Horace Heffner wrote:
The Larsen & Windom Patent on gamma shielding: "Apparatus and method
for absorption of incident gamma radiation and its conversion to
outgoing radiation at less penetrating, lower energies and
frequencies ":
http://patft.uspto.gov/netacgi/nph-Parser?S
The Larsen & Windom Patent on gamma shielding: "Apparatus and method
for absorption of incident gamma radiation and its conversion to
outgoing radiation at less penetrating, lower energies and
frequencies ":
http://patft.uspto.gov/netacgi/nph-Parser?
Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetaht
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