Anson MacDonald:
Science Fiction Technology and Ideas
One of the pseudonyms of Robert Anson Heinlein.
Invention/Technology Source Work (Publication Date)

Abbreviation for "atomic bomb".

Sixth Column (1941)

Bone Conduction Receiver
A concealed radio receiver.

Sixth Column (1941)

Epileptigenic Ray
Ray causes uncontrollable spasms in human subjects.

Sixth Column (1941)

Visible Halo
Providing a religious figure with a technological sign of grace.

Sixth Column (1941)

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