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 name ON name.patent = patent.patent AND name.type = patent.type WHERE (residence = 'Detroit, MI') ORDER BY date ASC, patent, type

Total of 17 patents found where: Residence is 'Detroit, MI';

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
 1866
U 52,329 January 30, 1866 Improvement in Lightning Rods
Lightning rod point with connection to rod made of corrugated copper sheet to increase surface area		 SHERWOOD, A. S.
 Lightning Rod Point  
 1884
U 303,936 August 19, 1884 Machine for Making Glass Insulators
Press for making insulators		 KRELL, Emil F.
 Press 3/5 to Orville W. Owen
 1887
U 360,215 March 29, 1887 Automatic Lathe
Insulator pin threading device		 FISHER, Frank E.
 Pin  
 1910
U Specimen known 977,262 November 29, 1910 Insulating Hanger
Knob - self-tying		 BIGHAM, Neal Jay
 Knob Harry A. Robertson
 1916
U 1,186,203 June 6, 1916 Apparatus for Use in Manufacturing Articles of Ceramic Material
Method of manufacturing spark plugs		 JEFFERY, Joseph A.
JEFFERY, Benjamin A.
 Manufacturing  
 1917
U 1,223,792 April 24, 1917 Apparatus for Use in Manufacturing Articles of Ceramic Material
Machine for manufacturing spark plugs		 JEFFERY, Joseph A.
JEFFERY, Benjamin A.
 Manufacturing  
U 1,240,575 September 18, 1917 Method of Preparing Ceramic Articles for Handling
Method of manufacturing clay bodies for porcelain insulators		 JEFFERY, Joseph A.
 Manufacturing  
 1920
U Specimen known 1,329,770 February 3, 1920 Insulator
Suspension type for J-D		 JOHNSTON, Robert M.
 Suspension Jeffery-Dewitt Co.
 1922
U 1,409,953 March 21, 1922 Ceramic Insulating Material
Porcelain composition using Sillimanite for high electrical and mechanical strength and low coefficient of expansion, which is particularly suitable for spark plugs		 JEFFERY, Joseph A.
 Porcelain Jeffery-Dewitt Co.
 1923
U 1,451,815 April 17, 1923 Rapid Decorating Firing Furnace or Kiln
Kiln for firing porcelain spark plug insulators		 DAVENPORT, Ransom W.
 Manufacturing Jeffery-Dewitt Co.
U 1,468,947 September 25, 1923 Furnace for Decorating Ceramic Ware
Kiln for firing porcelain spark plug insulators		 JEFFERY, Joseph A.
 Manufacturing Jeffery-Dewitt Co.
 1924
D 65,872 October 28, 1924 Design for a Bottle
Design for Bottle (Wolverine)		 SINGER, Julius M.
 HU Wolverine Bottling Works
 1927
U 1,631,729 June 7, 1927 Ceramic Insulating Material
Porcelain composition for spark plugs and insulators consisting of Sillimanite and a glassy matrix		 JEFFERY, Joseph A.
MONTGOMERY, Earle T.
 Porcelain Champion Porcelain Co.
U 1,631,730 June 7, 1927 Ceramic Material
Porcelain composition for spark plugs and insulators consisting of Sillimanite		 JEFFERY, Joseph A.
MONTGOMERY, Earle T.
 Porcelain Champion Porcelain Co.
 1929
U 1,706,987 March 26, 1929 Electric Wire Insulator
Bushing		 SCHAFFLER, Oscar
 Bushing  
U 1,723,174 August 6, 1929 Use of Dumortierite
Porcelain composition use the mineral dumortierite which allows firing at a lower temperature		 JEFFERY, Joseph A.
RIDDLE, Frank H.
 Porcelain Champion Porcelain Co.
 1939
U Specimen known 2,173,510 September 19, 1939 Conducting Holder for Luminous Tube Terminals
Neon terminal holder		 BELLOWS, Lewis F. R.
 Neon  

Total of 0.02 seconds