search:Index to classification of patents, July 1, 1947 United States.

by Patent Office

Ratist Community Rating

—/ 10

No reviews yet

Your Score Estimate

~?/ 10

Rate a few books to unlock your estimate

Rate

Community breakdown

Story
—
Writing & Style
—
Emotive Effect
—
Characters & Voice
—
Pure Entertainment
—

Bars show the community-aggregated score per category. Rate this book to contribute.