Crossword puzzle clue "with 23 historical period when negative numbers and paper were invented"

Here are the possible solutions for with 23 historical period when negative numbers and paper were invented clue

Answer
Clue
Relevancy
dynasty
Clue
With 23, Historical period when negative numbers and paper were invented
Definition
a succession of rulers from the same line of descent
forties
Clue
When Velcro, the Frisbee and Tupperware were invented
Definition
FORTY, a number
ohio
Clue
Where Ivory soap and the pop-top can were invented
omaha
Clue
Midwestern city where the TV dinner, the Top 40 radio format, and the bobby pin were invented (not all at once)
minus
Clue
Negative sign — negative thing
Definition
a negative quantity
earmuffs
Clue
They were invented by 15-year-old Chester Greenwood in the winter of 1873
Definition
EARMUFF, one of a pair of ear coverings, joined by a band across the head, worn to protect the ears from cold or noise
twoyearsbeforethemast
Clue
When were sails invented, Mr. Dana?
era
Clue
Long and important historical period
Definition
a main division of geological time

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