Patents

5396796   Humidity meter        March, 1995                     

             http://www.freepatentsonline.com/5396796.html

5317274   Humidity meter        May, 1994       

                      

              http://www.freepatentsonline.com/5317274.html

5065625   Humidity meter       November, 1991  

             http://www.freepatentsonline.com/5065625.html

4793182   Constant temperature hygrometer  December, 1988 

                                                                                                                                http://www.freepatentsonline.com/4793182.html

4662220  Water-absorbing capacitor system for measuring relative humidity               May,1987

                                                                                                                                 http://www.freepatentsonline.com/4662220.html

  4164868  Capacitive humidity transducer   August, 1979

                                                                                                                 http://www.freepatentsonline.com/4164868.html

  3582728  Capacitance Humidity Sensing Element    June, 1971

                                                                                                                  http://www.freepatentsonline.com/3582728.html

3523244  Device For Measurement Of Absolute Humidity    August, 1970

                                                                                                                   http://www.freepatentsonline.com/3523244.html

3075385  Hygrometer    January, 1963

                                                                                                                   http://www.freepatentsonline.com/3075385.html

  2237006  Electric hygrometer   April, 1941

                                                                                                                    http://www.freepatentsonline.com/2237006.html

  1855774  Humidity measuring     April, 1932

                                                                                                                    http://www.freepatentsonline.com/1855774.html

4379406   Relative humidity detector systems and method of increasing the calibration period of relative humidity detector systems    April, 1983        

http://www.freepatentsonline.com/4379406.html  

4288775  Device and method of manufacturing a relative humidity sensor and temperature sensor    September, 1981   

http://www.freepatentsonline.com/4288775.html

   

   4270085  Humidity detecting apparatus     May, 1981 

http://www.freepatentsonline.com/4270085.html

                                         

  4143177  Absolute humidity sensors and methods of manufacturing humidity sensors March, 1979

http://www.freepatentsonline.com/4143177.html

 

3987676  Relative humidity detector    October, 1976

http://www.freepatentsonline.com/3987676.html 

 3121853  Hygrometric elements   February, 1964

http://www.freepatentsonline.com/3121853.html 

 3196682  Humidity sensing circuit     July, 1965

                                                                                       http://www.freepatentsonline.com/3196682.html

3022667               Adsorption electric hygrometer        February 1962

http://www.freepatentsonline.com/3022667.html 

2710324Sensing element for the electric hygrometer    June 1955

http://www.freepatentsonline.com/2710324.html

2707880Relative humidity measuring apparatus    may 1955

http://www.freepatentsonline.com/2707880.html

2466903Electrical hygrometer  april 1949

http://www.freepatentsonline.com/2466903.html

2381299Hygrometer     august 1945

http://www.freepatentsonline.com/2381299.html

2015125Hygrometer      September 1935

http://www.freepatentsonline.com/2015125.html1935

2684592               Automatic temperature-compensated humidity indicator                 july 1954

http://www.freepatentsonline.com/2684592.html 1954

2285421   Humidity variable resistance       June, 1942

http://www.freepatentsonline.com/2285421.html

1956386   Hygrometer          April, 1934

http://www.freepatentsonline.com/1956386.html

1855774   Humidity measuring        April, 1932

http://www.freepatentsonline.com/1855774.html

2629054            Compensated humidity-measuring circuit       February 1953

http://www.freepatentsonline.com/2629054.html 

2571458            Temperature compensated diode measuring circuits     October 1951

http://www.freepatentsonline.com/2571458.html

2412782            Wet bulb thermometer and thermostat      December 1946

http://www.freepatentsonline.com/2412782.html

1836934            Electrical meter       December, 1931

http://www.freepatentsonline.com/1836934.html

3719810  Circuit for calculating relative humidity       March, 1973       

http://www.freepatentsonline.com/3719810.pdf