11 ms·
Here's the patent in question: http://www.google.com/patents?vid=USPAT4197590 http://www.google.com/patents?vid=USPAT4197590
by Sodaware 15y ago
Here's the patent in question: http://www.google.com/patents?vid=USPAT4197590 http://www.google.com/patents?vid=USPAT4197590