US4786795A - Sun Tracking Device Floating Upon Liquid Surface - Google Patents

Alan Kirsch edited this page 2025-12-23 04:40:45 +08:00

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Author	SHA1	Message	Date
Alan Kirsch	81f7d7ee88	Add US4786795A - Sun Tracking Device Floating Upon Liquid Surface - Google Patents	2025-12-23 04:40:45 +08:00