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SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN name ON name.patent = patent.patent AND name.type = patent.type WHERE (last_name = 'ROWLAND') AND (first_name = 'Davidge H.') ORDER BY specimen ASC, date, patent, type

Total of 18 patents found where: Last Name is 'ROWLAND'; First Name is 'Davidge H.';

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T / S Patent Date Description Patentee Category Assigned To
 1930
U 1,744,566 January 21, 1930 Ground Resistance Test Set
Portable instrument to measure electrical ground resistance		 MOTT, Everett V.
ROVERE, Lewis H.
ROWLAND, Davidge H.
 Testing Western Union Telegraph Co.
U 1,780,246 November 4, 1930 Glass Insulator and Method of Making Same
Suspension glass Hewlett design with embedded/loose fitting metal brackets		 ROWLAND, Davidge H.
 Suspension Locke Insulator Corp.
U 1,784,392 December 9, 1930 Manufacture of Insulators
Suspension insulator with glazed sanded surfaces to improve strength of cap		 ROWLAND, Davidge H.
 Suspension Locke Insulator Corp.
 1931
U 1,822,458 September 8, 1931 Measuring Apparatus
Device to measure the density of clay slip		 ROWLAND, Davidge H.
ROBERTSON, John C.
 Manufacturing Locke Insulator Corp.
 1933
U 1,925,058 August 29, 1933 Process for Forming Plastic Clay Masses
Wet process clay reflocculation method to eliminate pugging process		 ROWLAND, Davidge H.
WETZEL, Kurt
 Wet Process Locke Insulator Corp.
 1934
U 1,953,025 March 27, 1934 Corona Shield
Corona shield in the form of a metal band that fits around the tie-wire groove		 ROWLAND, Davidge H.
 Corona Locke Insulator Corp.
U 1,983,569 December 11, 1934 Pedestal Switch Insulator
Pedestal insulator to support switch gear or bus bar		 ROWLAND, Davidge H.
 Pedestal Locke Insulator Corp.
 1936
U 2,044,332 June 16, 1936 Apparatus for Forming Ceramic Products
Manufacturing method to produce well mixed clay slip for casting insulators		 ROWLAND, Davidge H.
 Manufacturing Locke Insulator Corp.
U 2,059,036 October 27, 1936 Clay Testing Apparatus
Machine to measure the hardness or plasticity of clay		 ROWLAND, Davidge H.
 Manufacturing Locke Insulator Corp.
 1941
U 2,230,205 January 28, 1941 Process of Connecting a Metal Body to a Vitreous Ceramic Body
Metallic coating to facilitate soldering metal parts onto the insulator		 ROWLAND, Davidge H.
CROSKEY, Carl D.
 Miscellaneous Locke Insulator Corp.
U 2,250,044 July 22, 1941 Insulator
Multipart insulator with glazed sanded surfaces to improve strength of cap		 CROSKEY, Carl D.
ROWLAND, Davidge H.
 Multipart Locke Insulator Corp.
U 2,264,152 November 25, 1941 Method of Forming a Metallic Surface on Ceramic Bodies
RFI metallic coating that strongly adheres to the insulator		 ROWLAND, Davidge H.
 RFI Locke Insulator Corp.
 1944
U 2,357,550 September 5, 1944 Insulator
RFI coating applied before firing the insulator		 ROWLAND, Davidge H.
 RFI Locke Insulator Corp.
 1946
U 2,395,295 February 19, 1946 Method of Producing Insulators
Improved method of jiggering and plunging		 ROWLAND, Davidge H.
 Manufacturing  
 1948
U 2,437,559 March 9, 1948 Insulator and Method of Manufacturing Same
Addition of powdered aluminum to improve quality of porcelain		 ROWLAND, Davidge H.
 Manufacturing The Porcelain Insulator Corp.
 1934
U Specimen known 1,955,609 April 17, 1934 Insulator
U-856A fogbowl		 ROWLAND, Davidge H.
 Insulator Locke Insulator Corp.
 1939
U Specimen known 2,157,100 May 9, 1939 Glazed Ceramic Insulator and the Like
Glaze - compression glaze		 ROWLAND, Davidge H.
 Glaze Locke Insulator Corp.
 1942
U Specimen known 2,287,976 June 30, 1942 Insulator
Glaze - compression glaze & sand joint		 CROSKEY, Carl D.
ROWLAND, Davidge H.
 Glaze Locke Insulator Corp.

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