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...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.

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Class D07/358 - Pressure cooker


Subclass of Class D07 - Equipment for preparing or serving food or drink not elsewhere specified
Definition: Design that provides a sealed, airtight compartment where
No. of patents: 23
Last issue date: 10/04/2011


NumberTitleIssue Date
D646115Cooking pot
10/04/2011
D646117Cooking pot
10/04/2011
D646116Cooking pot
10/04/2011
D642422Electric pressure cooker
08/02/2011
D641203Non-electric pressure cooker
07/12/2011
D618041Cooking pot
06/22/2010
D618042Cooking pot
06/22/2010
D615807Cooker with a combination airflow control and spark arrestor assembly
05/18/2010
D610393Pressure cooker
02/23/2010
D607267Pressure cooker
01/05/2010
D598701Electric pot
08/25/2009
D581206Pressure cooker
11/25/2008
D572521Pressure cooker
07/08/2008
D570153Pressure cooker
06/03/2008
D549517Pressure cooker
08/28/2007
D543772Pressure cooker
06/05/2007
D539077Pressure cooker
03/27/2007
D534031Pressure cooker
12/26/2006
D532250Pressure cooker
11/21/2006
D530974Pressure cooker
10/31/2006
D530145Pressure cooker
10/17/2006
D491011Pressure cooker
06/08/2004
D489223Electrical pressure cooker
05/04/2004
 
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