Differences between version 23 and predecessor to the previous major change of HammondPatents.

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Newer page: version 23 Last edited on June 20, 2019 8:32 pm. by
Older page: version 22 Last edited on June 17, 2019 7:27 pm. by
@@ -14,8 +14,9 @@
 1939 2,159,505 Hammond Electric Organ (chorus generator). 
 1939 2,161,706 Hammond Electrical Musical Instrument (Delay circuit). 
 1939 2,173,888 Smiley Electronic Musical Instrument (Grid-bias keying). 
 1939 2,184,424 Hammond Electrical Musical Instrument (Keyboard construction). 
+1930 2,159,505 Hammond Electric Organ (Improvements to original organ patent).  
 1940 2,199,702 Hammond Method of Broadcasting (Radio studio organ miking). 
 1940 2,203,432 George, Hammond Electrical Musical Instrument (6 oscillators). 
 1940 2,203,569 Hammond Musical Instrument (Solovox). 
 1940 2,216,513 Hammond Electrical Musical Instrument (Slow decay with capacitors). 

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