http://www.fas.org/blog/secrecy/2010/10/invention_secrecy_2010.html
Quote:
Most of the listed technology areas are closely related to military applications. But some of them range more widely.
Thus, the 1971 list indicates that patents for solar photovoltaic generators were subject to review and possible restriction if the photovoltaics were more than 20% efficient. Energy conversion systems were likewise subject to review and possible restriction if they offered conversion efficiencies “in excess of 70-80%.”
http://www.fas.org/sgp/othergov/invention/35usc17.html
Quote:
Most of the listed technology areas are closely related to military applications. But some of them range more widely.
Thus, the 1971 list indicates that patents for solar photovoltaic generators were subject to review and possible restriction if the photovoltaics were more than 20% efficient. Energy conversion systems were likewise subject to review and possible restriction if they offered conversion efficiencies “in excess of 70-80%.”
http://www.fas.org/sgp/othergov/invention/35usc17.html
