"USD218671S - Punch". September 15, 1970 [Filed August 13, 1969]. Publication number USD218671S. Archived from the original on March 3, 2024. Retrieved November 7, 2024 – via Google Patents.
"USD213958S - Figure". April 29, 1969 [Filed December 12, 1967]. Publication number USD213958S. Archived from the original on March 3, 2024. Retrieved November 7, 2024 – via Google Patents.
"USD218671S - Punch". September 15, 1970 [Filed August 13, 1969]. Publication number USD218671S. Archived from the original on March 3, 2024. Retrieved November 7, 2024 – via Google Patents.
"USD213958S - Figure". April 29, 1969 [Filed December 12, 1967]. Publication number USD213958S. Archived from the original on March 3, 2024. Retrieved November 7, 2024 – via Google Patents.