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U.S. PATENT AND TRADEMARK OFFICE
Electronic Information Products Division
Patent Technology Monitoring Branch (PTMB)

Patenting In Technology Classes
Breakout By Geographic Origin (State and Country)

Count of 1963 - 2005 Utility Patent Grants,
By Calendar Year of Grant
With Patent Counts Based on Primary Patent Classification

- Explanation of Data -

Rank Ordered Listing of U.S. States and Countries
From Which 1 or More Utility Patents Originated During the Period
Having Primary Classification In

Class 237, Heating Systems

( technology class is determined by the primary classification assigned to the patent- see 'Explanation of Data' )
( patent origin is determined by the residence of the first-named inventor )

This table displays U.S. states and countries and their counts of utility patents; patents are distributed by year of patent grant
(U.S. or Foreign) Code State-Territory or Country 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 Total
(U.S.) MI MICHIGAN 3 0 4 5 2 4 1 1 2 0 1 1 2 0 1 1 3 1 5 0 5 2 5 1 4 0 1 0 1 0 2 5 1 1 2 0 1 2 2 2 2 5 0 81
(U.S.) NY NEW YORK 2 0 3 1 1 1 0 0 1 1 2 1 3 3 4 3 3 0 4 4 1 4 1 2 2 0 1 0 2 0 1 0 0 1 0 1 1 1 0 0 3 1 1 60
(U.S.) OH OHIO 1 0 1 1 3 2 0 0 0 2 1 0 1 2 1 2 2 0 1 3 1 0 0 2 0 0 1 3 0 0 4 1 2 2 2 2 0 1 0 2 1 0 0 47
(U.S.) IL ILLINOIS 4 2 5 3 1 2 3 1 0 2 1 1 0 0 1 0 2 0 2 4 1 0 0 0 0 0 0 0 0 1 1 1 1 0 0 1 0 1 1 0 0 0 3 45
(U.S.) MA MASSACHUSETTS 0 0 0 0 0 0 0 0 0 0 1 0 0 0 2 1 4 1 2 0 0 2 0 0 0 0 0 0 1 2 2 1 1 2 2 3 5 2 7 2 1 0 1 45
(U.S.) PA PENNSYLVANIA 3 3 0 0 0 0 1 0 2 0 0 0 0 2 1 1 3 1 3 3 1 1 1 2 1 0 1 0 0 0 1 1 0 0 0 1 0 1 0 0 2 0 0 36
(U.S.) MN MINNESOTA 0 1 0 0 0 0 0 1 0 0 0 0 1 0 1 0 1 1 0 0 0 1 1 0 1 2 0 1 0 1 1 1 1 0 0 1 2 0 0 1 4 4 3 31
(U.S.) NJ NEW JERSEY 1 3 2 2 0 0 2 0 0 0 0 0 1 1 1 1 1 0 1 2 1 0 1 3 0 0 1 0 2 1 0 2 0 0 0 0 1 1 0 0 0 0 0 31
(U.S.) CA CALIFORNIA 0 0 1 1 2 0 1 1 0 1 0 1 0 0 1 1 2 0 0 2 1 2 2 1 0 0 0 1 1 0 1 0 1 0 0 1 0 0 0 0 3 0 0 28
(U.S.) IN INDIANA 0 1 1 3 2 0 2 1 0 0 0 0 0 0 0 0 0 0 0 2 1 1 0 1 2 0 0 0 2 0 0 0 2 0 1 0 2 1 0 1 0 1 1 28
(U.S.) WI WISCONSIN 0 0 0 0 0 1 0 1 0 0 1 0 1 1 1 0 0 2 1 1 0 0 0 0 2 1 0 1 0 0 0 1 0 0 0 0 0 1 1 0 1 1 0 19
(U.S.) CO COLORADO 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 2 0 1 0 0 0 0 0 0 2 2 1 0 0 0 0 1 0 0 1 2 0 1 1 0 16
(U.S.) CT CONNECTICUT 1 0 2 1 1 2 0 0 0 0 0 0 0 0 0 0 1 0 1 1 3 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 1 0 0 0 16
(U.S.) MD MARYLAND 0 0 1 0 1 0 0 0 2 0 0 1 0 1 1 1 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 3 0 0 0 0 1 0 0 15
(U.S.) IA IOWA 0 0 1 0 0 1 0 0 0 0 0 0 0 1 1 1 1 1 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 1 0 13
(U.S.) VA VIRGINIA 0 1 0 2 1 1 0 0 0 0 0 0 1 0 1 1 0 0 0 1 1 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 13
(U.S.) GA GEORGIA 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 2 0 0 2 0 1 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 2 0 0 0 0 11
(U.S.) TX TEXAS 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 2 0 1 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 1 0 1 0 0 0 1 11
(U.S.) NC NORTH CAROLINA 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 0 1 1 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 1 1 0 0 10
(U.S.) MO MISSOURI 0 0 0 0 0 1 0 1 0 0 0 0 1 0 2 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 1 0 9
(U.S.) AZ ARIZONA 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 2 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8
(U.S.) AR ARKANSAS 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 1 0 0 1 0 0 0 1 0 0 0 0 0 0 7
(U.S.) FL FLORIDA 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1 0 1 0 0 7
(U.S.) WA WASHINGTON 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 2 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 7
(U.S.) KS KANSAS 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 3 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6
(U.S.) ME MAINE 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 1 0 0 0 0 0 6
(U.S.) OR OREGON 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 3 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6
(U.S.) KY KENTUCKY 0 0 0 0 0 0 0 1 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5
(U.S.) LA LOUISIANA 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5
(U.S.) RI RHODE ISLAND 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 5
(U.S.) NE NEBRASKA 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 4
(U.S.) TN TENNESSEE 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4
(U.S.) AK ALASKA 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 3
(U.S.) AL ALABAMA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3
(U.S.) NH NEW HAMPSHIRE 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3
(U.S.) SD SOUTH DAKOTA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3
(U.S.) ID IDAHO 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2
(U.S.) NM NEW MEXICO 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 2
(U.S.) OK OKLAHOMA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 2
(U.S.) SC SOUTH CAROLINA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 2
(U.S.) UT UTAH 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2
(U.S.) DE DELAWARE 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
(U.S.) MS MISSISSIPPI 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 1
(U.S.) MT MONTANA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1
(U.S.) VT VERMONT 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
(U.S.) WV WEST VIRGINIA 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
(U.S.)   -- Subtotal -- 16 14 23 24 15 15 10 9 8 8 7 6 13 16 21 17 36 13 27 30 22 23 14 15 20 7 9 13 13 8 17 17 12 8 9 15 16 15 20 13 21 16 11 662
(Foreign) DEX GERMANY 0 1 2 7 2 5 5 4 4 6 2 2 5 2 6 2 2 4 3 8 10 12 7 10 5 9 7 6 10 5 9 3 4 6 5 8 4 3 2 5 5 6 5 218
(Foreign) JPX JAPAN 0 0 0 0 0 0 0 0 1 1 0 0 2 2 0 2 1 1 0 6 7 2 5 14 9 4 7 13 2 10 1 2 0 4 7 18 18 21 9 9 5 3 3 189
(Foreign) CAX CANADA 0 0 0 0 0 1 1 1 1 0 1 4 0 1 1 0 0 1 0 0 0 0 1 1 0 3 1 0 0 0 1 1 0 1 1 2 3 4 4 3 0 0 2 40
(Foreign) FRX FRANCE 0 1 0 1 1 1 0 0 0 3 0 1 1 0 1 1 1 1 0 1 1 0 1 0 2 1 0 3 1 2 0 1 0 0 0 1 2 0 0 2 1 0 0 32
(Foreign) SEX SWEDEN 0 0 0 0 1 0 0 0 2 0 0 2 0 5 1 0 3 2 0 0 4 0 2 1 0 0 2 0 0 0 2 0 1 0 1 0 1 0 1 0 0 0 0 31
(Foreign) GBX UNITED KINGDOM 1 2 2 1 2 0 0 1 0 0 0 0 2 0 0 2 1 0 1 1 1 0 0 0 2 0 0 0 1 1 0 0 0 1 1 1 0 1 0 0 0 1 0 26
(Foreign) CHX SWITZERLAND 2 0 0 0 0 0 0 0 2 1 0 1 0 0 0 1 0 2 0 0 0 0 1 0 0 1 1 0 0 0 0 1 0 0 0 1 0 0 0 3 1 0 0 18
(Foreign) NLX NETHERLANDS 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 0 4 0 1 0 0 0 0 0 1 0 0 1 0 1 0 0 0 0 1 13
(Foreign) KRX SOUTH KOREA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 3 0 0 0 0 0 1 0 0 1 0 0 0 2 3 1 12
(Foreign) DKX DENMARK 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 1 0 1 0 0 0 0 0 2 0 0 0 0 0 0 2 0 0 1 0 0 0 0 0 0 0 0 0 9
(Foreign) ITX ITALY 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 3 0 0 8
(Foreign) BEX BELGIUM 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 6
(Foreign) ATX AUSTRIA 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 4
(Foreign) AUX AUSTRALIA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 3
(Foreign) ESX SPAIN 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 3
(Foreign) FIX FINLAND 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 3
(Foreign) HUX HUNGARY 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3
(Foreign) IEX IRELAND 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 2
(Foreign) ILX ISRAEL 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2
(Foreign) TWX TAIWAN 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 2
(Foreign) LIX LIECHTENSTEIN 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
(Foreign) MCX MONACO 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
(Foreign) NOX NORWAY 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1
(Foreign) NZX NEW ZEALAND 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
(Foreign) SUX U.S.S.R. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
(Foreign)   -- Subtotal -- 3 4 5 9 6 7 7 7 13 11 3 11 10 12 11 10 8 13 5 17 26 16 19 28 25 21 19 29 15 18 15 8 7 15 15 34 29 31 18 25 18 14 12 629
(ALL) ALL All Regions, U.S. and Foreign 19 18 28 33 21 22 17 16 21 19 10 17 23 28 32 27 44 26 32 47 48 39 33 43 45 28 28 42 28 26 32 25 19 23 24 49 45 46 38 38 39 30 23 1291


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