Search the Insulator Patent Reference Library:

Build your search criteria. The patent must match all the values specified.
Select patent types: Utility   Design   Reissue
Patent number:
Date:
Year between: and
Patentee starting with:
City:
State:
Assigned To starting with:
Description containing:
Category:
Class:    Subclass:
Click Search when complete:
SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN category ON category.patent = patent.patent AND category.type = patent.type WHERE (category.class = '174') AND (category.subclass = '202') ORDER BY date ASC, patent, type

Total of 52 patents found where: Class is '174'; Subclass is '202';

View a patent by clicking on the patent number. You can sort by any of the columns by clicking on the column name.

T / S Patent Date Description Patentee Category Assigned To
 1870
R Specimen known 3,847 February 22, 1870 Improvement in Insulators
Threads formed internally for screw pin (reissue of 48,906)		 CAUVET, Louis A.
 Thread  
 1871
U 115,521 May 30, 1871 Improvement in Insulators for Telegraph Wires
Threadless insulator with metal thimble cemented in pinhole		 READ, Horatio
 Thimble 1/2 to B. B. Hagerty
 1872
U Specimen known 123,878 February 20, 1872 Improvement in Telegraph Insulators
CD 141.9, four projections to reduce surface contact 		EMMINGER, David R. P.
 Insulator  
 1882
U 255,800 April 4, 1882 Insulator for Electrical Conductors
Pin hole with spiral slot to receive pin with side knob		 LEWIS, Albert C.
 Pin  
 1883
U 281,452 July 17, 1883 Telegraph Insulator
Insulator with side bracket (see OBX March 1973, p. 43)		 CHAPMAN, Thomas L.
 Insulator  
U Specimen known 289,449 December 4, 1883 Insulator
Transposition style but not intended for transposition (CD 199 & U-197)		 ROUSSEAU, Necter
 Insulator 1/2 to James W. Brennan
U Specimen known 290,922 December 25, 1883 Insulator for Electrical Conductors
CD 110.5 & CD 110.6 spiral crown with opposing internal threads & wire clamp		 POPE, Frank L.
 Insulator  
 1884
U 297,101 April 22, 1884 Insulator for Telegraph Wires
Pin hole shaped to receive a keyed pin (advertisement eBay 4-2001)		 BALDWIN, Luther C.
THURSTON, John C.
 Pin  
U 298,593 May 13, 1884 Insulator
Washer around pin in pinhole		 LEWIS, Joseph Slater
 Washer 1/2 to William P. Thompson
 1885
U 317,479 May 5, 1885 Insulator for Electric Wires
Insulator with corrugations (vertical) inside skirt		 WRIGHT, William H.
 Insulator  
U 321,646 July 7, 1885 Electric Wire Insulator
Pin with spars to fit in threaded pin hole		 SCHOONMAKER, Edward T.
 Pin 1/2 to John E. Smith
 1888
U 386,986 July 31, 1888 Electric Insulator Peg
Pin (wooden) tapered below threads & to have metal rod inserted, too		 JOSLIN, William E.
 Pin  
 1890
U Specimen known 434,879 August 19, 1890 Electric Insulator
CD 144.5 and CD 260, ridges around inner surface of skirt		 OAKMAN, Samuel
 Insulator  
 1891
U 448,703 March 24, 1891 Support for Electric Line Wires
Hanger insulator for trolley conductor		 WIRT, Herbert C.
 Hanger  
 1892
U 476,604 June 7, 1892 Insulator Bracket
Bracket with pin and hollow threaded head		 BRADY, Thomas H.
 Bracket  
 1893
U 505,123 September 19, 1893 Insulator Pin
Pin (wooden) strengthened by metal rod		 O'NEILL, James J.
 Pin  
U 510,809 December 12, 1893 Insulator Pin
Pin		 LOCKE, Fred M.
 Pin 1/2 to G. Paddock & W. Page
 1894
U Specimen known 526,498 September 25, 1894 Conductor Support and Insulator
Jeffrey Mine insulator (CD 185)		 OSYOR, David N.
 Mine Joseph A. Jeffrey
U 527,318 October 9, 1894 Insulator Pin
Pin, wooden with internal reinforcing metal bar		 BULLOCK, Edward J.
 Pin 1/2 to Merwin Tuttle
 1896
U 554,664 February 18, 1896 Means for Supporting and Insulating Electric Conductors
Pin coated with water repelling material		 ECKERT, Thomas T.
 Pin  
 1897
U 579,725 March 30, 1897 Insulator and Holder for Electric Railways
Trolley hanger insulator suspended from a cable. It is composed of an inverted insulator cup and a metal cover.		 KEITHLY, Willie C.
 Trolley Hanger  
U 582,396 May 11, 1897 Insulator
Self-tying slot top		 SCHNEE, William G.
 Self-tying Slot Top 1/2 to John R. Dixon
 1899
U Specimen known 626,065 May 30, 1899 Insulator
Tree hanger		 HOLMES, Welles E.
 Tree  
U 628,343 July 4, 1899 Fixing of Insulators for Carrying Electric Line Wires
Metal pin with a threaded end for mounting an insulator and below that angular grooves to aid mounting and mortaring in brick, concrete or stone (see gb1899-0002396)		 MENZEL, Werner
 Pin  
 1901
U 685,776 November 5, 1901 Insulator Support
Pin sleeve plug with bolt to draw down & expanding sleeve in pin hole		 LOCKE, Fred M.
 Pin  
 1902
U 701,246 May 27, 1902 Insulator Pin and Bracket
Pin and bracket for crossarm		 BAILEY, Elbert T.
 Pin  
U Specimen known 707,429 August 19, 1902 Insulator for Electric Wires
CD 207.5; Self-tying twist lock type (see 952,279) (see design 35,462)		 KING, Theodore F.
 Self-tying Twist  
 1907
U 853,744 May 14, 1907 High Tension Insulator
Multipart pintype insulator with large top skirt		 STEINBERGER, Louis
 Electrose  
U 868,122 October 15, 1907 Electric Insulator
Multipart with glass skirt and two-piece head similar to Locke 25		 POINAN, Francis J.
 Multipart  
 1908
U 884,641 April 14, 1908 Hanging Insulator
Suspension with multipart shells and cable clamp		 CLARK, Walter G.
 Suspension  
U 893,285 July 14, 1908 Electric Cable Insulator
Terminal insulator providing a tight seal between conductor running down through the center of the insulator		 TOMPKINS, Edward M.
 Insulator  
 1912
U 1,045,536 November 26, 1912 Insulator Pin
Pin (metal) with elastic washer under threads to firmly hold insulator, prevent breakage		 ETTE, Charles G.
 Pin Ette Investment Co.
 1914
U Specimen known 1,107,111 August 11, 1914 Insulator
U-186		 PURKEY, Benjamin S.
 Insulator  
 1916
U 1,207,321 December 5, 1916 Insulator Support
Pin, metal to fit loose in sheet metal thimble		 PEIRCE, JR., Charles L.
 Pin 1/2 to Hubbard & Co.
 1917
U 1,234,205 July 24, 1917 Strain Insulator
Suspension using metal jaws inside to secure pin instead of using cement		 OSBORNE, David H.
 Suspension Locke Insulator Mfg. Co.
 1918
U 1,258,211 March 5, 1918 Insulator Support
Multipart supporting pin		 GODDARD, Walter T.
 Multipart Locke Insulator Mfg. Co.
 1922
U 1,435,225 November 14, 1922 Insulator
Pin, wooded covered with metal for strength and to keep wood dry		 GILCHREST, George Irving
 Pin Westinghouse Electric & Mfg. Co.
 1923
U 1,444,434 February 6, 1923 Insulator Supporting Pin
Pin with corkscrew for threading into bottom of Electrose insulator		 STEINBERGER, Louis
 Pin  
U 1,468,043 September 18, 1923 Insulator Supporting Pin
Electrose pin		 STEINBERGER, Louis
 Pin  
 1924
U 1,484,569 February 19, 1924 Ceramic Body
Method of making a suspension disk by inserting a fired porcelain part inside the bottom of an unfired disk, then firing the disk, which shrinks around the insert securing a cemented pin inside		 SCHEID, Johannes Friedrich
 Suspension H. Schomburg & Shone
 1926
U 1,612,358 December 28, 1926 Insulator
Pin with cup below the threads to cover the inner skirt of the insulator and help secure the insulator to the pin		 BROWN, James M.
 Pin Westinghouse Electric & Mfg. Co.
 1928
U Specimen known 1,687,495 October 16, 1928 Insulator
Transposition (1-piece) for telephone line shaped like CD 194.5, CD 195.5 		GORDON, Chester S.
LOWE, James T.
 Insulator American Telephone & Telegraph Co.
U 1,687,535 October 16, 1928 Reduction of Losses in Insulators, Pins, and Cross Arms
Carrier circuit insulator with specific diameter/pin ratio		 AFFEL, Herman A.
GREEN, Estill I.
 Carrier American Telephone & Telegraph Co.
U 1,691,964 November 20, 1928 Insulator Locking Device
Pin with locking device to fit in threads to secure insulator		 DICKEY, Ray S.
CARNAHAN, Paul A.
 Pin  
 1929
U 1,704,005 March 5, 1929 Insulator Mounting
Suspension pin with lugs that fits in slot and turned to lock it inside the insulator		 KATZENBERGER, Bernard
JANSEN, Theodor
 Suspension Aktiengesellschaft Brown Boveri & Cie.
 1933
U 1,927,106 September 19, 1933 Insulator
Carrier circuit insulator with metal skirt coated with insulating material		 WILSON, Leon T.
 Carrier American Telephone & Telegraph Co.
 1940
U 2,215,152 September 17, 1940 Insulator
Rubber insert		 HOSFIELD, Glenn E.
 Rubber  
U Specimen known 2,218,497 October 15, 1940 Electrical Insulator
Rubber pin type insulator (see 2,304,483)		 SMITH, Donald H.
WHEELER, Herbert H.
 Rubber Western Union Telegraph Co.
 1941
U 2,228,804 January 14, 1941 Insulator Pin
Pin made of Bakelite and nailed underneath the crossarm		 ADAMS, Basil R. S.
 Pin  
 1943
U 2,317,799 April 27, 1943 Line Insulator
Insulator composed of a metallic hollow shell coated with ceramic material		 PERLES, Maurice
 Insulator Mycalex Corp. of America
 1955
U 2,703,820 March 8, 1955 Insulator Assembly
Odd pintype insulator with teepee top that screws down to hold a pair of wires		 LAYMAN, Robert E.
 Miscellaneous  
 1977
U 4,047,279 September 13, 1977 Upgrading Current Distribution Insulators
Miscellaneous insulator with male screw to receive existing insulator for upgrading		 PETTIT, Ernest E.
 Miscellaneous W. Leon Sell/Ernest E. Pettit/R. Don Sell

Total of 0.01 seconds