Patents
granted for the
Hickman Grand Piano Action
and improvements
U.S. Patents 1,823,142 & 1,866,707
compiled by Robbie Rhodes

The images in the list following were downloaded from the web site of the U.S. Patent & Trademark Office (USPTO):
  http://www.uspto.gov/main/patents.htm
  http://www.uspto.gov/patft/index.html
  http://patft.uspto.gov/netahtml/srchnum.htm

The TIFF images from USPTO are compressed using CCITT Fax Group 4 compression, which is a lossless and powerful method but it is not supported by all image viewers, and so GIF files have also been created.  (A browser plug-in which displays TIFF images can be downloaded from http://www.alternatiff.com/).


        Patent 1,823,142 (grand piano action)                 Patent 1,866,707 (key force adjustment)
pat1_CCITT4.tif (48 Kb)
pat2_CCITT4.tif (48 Kb)
pat3_CCITT4.tif (64 Kb)
pat4_CCITT4.tif (98 Kb)
pat5_CCITT4.tif (137 Kb)
pat6_CCITT4.tif (118 Kb)
pat7_CCITT4.tif (133 Kb)
pat8_CCITT4.tif (112 Kb)
pat9_CCITT4.tif (40 Kb)
pat1.gif (117 Kb)
pat2.gif (120 Kb)
pat3.gif (152 Kb)
pat4.gif (205 Kb)
pat5.gif (251 Kb)
pat6.gif (238 Kb)
pat7.gif (242 Kb)
pat8.gif (232 Kb)
pat9.gif (79 Kb) 
key1.tif ( 57 Kb)
key2.tif ( 34 Kb)
key3.tif (135 Kb)
key4.tif (125 Kb)
key5.tif ( 39 Kb)
key6.tif ( 14 Kb) 
key1.gif (130 Kb)
key2.gif (111 Kb)
key3.gif (238 Kb)
key4.gif (250 Kb)
key5.gif ( 63 Kb)
key6.gif ( 41 Kb)
 

pat1a.jpg (45 kb)


16 February 2002