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 = '84') AND (category.subclass = '190') ORDER BY date ASC, patent, type

Total of 6 patents found where: Class is '84'; Subclass is '190';

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
 1871
U 121,686 December 5, 1871 Improvement in Sounding Boards for Pianos
Support for piano comprised of three layers of wooden boards
TAYLOR, Edward L.
Piano  
 1877
U 189,441 April 10, 1877 Improvement in Hollow Supports for Pianos
Hollow block to support piano legs (see reissue 7,750)
FAIRMAN, James
Piano  
R 7,750 June 19, 1877 Improvement in Piano Attachments
Hollow block to support piano legs (see 189,441)
FAIRMAN, James
Piano  
 1917
U 1,221,225 April 3, 1917 Floor Protecting Attachment for Furniture
Cup of wood or rubber to hold caster wheel and sheet metal insert to secure caster from movement
SCHAUERMANN, Edward
Piano The Hold Fast Caster Cup Co.
 1925
U 1,562,817 November 24, 1925 Piano Glide
Glass shell with bottom made of polished hardwood to aid in moving piano and act as an insulator
WISMER, George C.
Piano  
 1955
U 2,699,628 January 18, 1955 Caster Cup
Molded top supporting plate supported by resilent material
AUER, Betty
Piano  

Total of 0.02 seconds