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Books Books 1 - 2 of 2 on There are enough unpatented designs of tiles of perfectly commercial grade, in all....
" There are enough unpatented designs of tiles of perfectly commercial grade, in all styles, so that no one should think that a new patent design will protect him from competition. Today, it is a question of producing tiles of the proper quality at the... "
The Manufacture of Roofing Tiles - Page 60
by Wolsey Garnet Worcester, Edward Orton, Geological Survey of Ohio - 1910 - 476 pages
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Bulletin, Issue 11

Geology - 1910
...single design is going to find universal acceptance or control the market. There are enough unparented designs of tiles of perfectly commercial grade, in...order is as follows, including all patents prior to 1U09: TABLE No. ,5 Patents Granted for Roofing Tile Designs, Originating in the United States. State...
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Fourth Series, Bulletin, Issue 11

Geology - 1910
...of general interest to roofing tile makers, present and prospective, it has been thought worth whije to record in this volume some statistics as to just...follows, including all patents prior to 1909: TABLE No. a Patents Granted for Roofing Tile Designs, Originating in the United States. No. 1:2 State No. State...
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