U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Did You Know...

...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."

Newsletter  PatentStorm News

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

 

Class 210/143 - AUTOMATIC CONTROL


Subclass of Class 210 - Liquid purification or separation
Definition: Apparatus having means to sense some condition of a treatment
No. of patents: 962
Last issue date: 03/20/2012


                    25  
NumberTitleIssue Date
3931009Water purification apparatus and timing device for initiating a backwashing cycle
A water purification apparatus is disclosed having an aeration chamber for aerating unpurified water from a source. A filter chamber is provided beneath the aeration chamber containing granular media for filtering the aerated water and having spaced apart...
01/06/1976
                    25  
 
Sign InRegister
Username  
Password   
forgot password?