A PDF collection of many unique and interesting patents from early Ameica, for guitar "improvements", new instrument inventions related to the guitar, guitar variations, combinations, guitar parts, slides, picks, attachments of many kinds etc. 
        
          The collection includes... 
          Arm Rest for Guitar 
            Auxillary Vibrator for Guitar 
            
            Bar for Guitar 
            Bell Attachment for Guitars or Banjos 
            Capo Tasto 
            Capodastro 2 for Guitar 
            Capodastro 1 for Guitar 
            Chord Playing Attachment 
            Combined Guitar and Mandolin 
            Combined Mandolin & Guitar 
            Double Bass Guitar 
            Dulcimer 
            Electronic Music Instrument (1893) 
            Finger Shield 
            Fingerboard 
            Fingering Attachment 
            Fingering Device for Guitar 
            Glass Tonebar 
            Guitar 1 
            Guitar 2 
            Guitar 3 
            Guitar 4 
            Guitar 5 
            Guitar 6 
            Guitar 7 
            Guitar 8 
            Guitar 9 
            Guitar 10 
            Guitar 11 
            Guitar Banjo 
            Guitar Bridge 
            Guitar Cithern 
            Guitar Music Notation 
            Guitar or Other Stringed Instrument 
            Guitar Pick 
            Guitar Steel 
            Guitar-Banjo 
            Improvements in Guitars, Violins etc 
            Imrpovement for Guitars 
            Keyboard for Guitar or other String Instruments 
            Mandolin Attachment for Guitar 
            Musical Instrument 1 
            Musical Instrument 2 
            Musical Instrument 3 
            Musical Instrument 5 
            Musical Instrument 6 
            Musical Instrument 4 
            Musical Stringed Instrument 
            Mute for String  Instruments 
            Pedal Guitar 
            Pick for Music Instruments 
            Revolving Musical Scale 
            String Bridge for Guitars 
            Stringed Musical Instrument 
            Strnged Instrument of the Guitar or Mandolin variety 
            Tailpiece 
            Tone Amplifier for String Instruments 
            Tone Enriching Device 
            Tremelo Attachment 
            
            
          You can download the above  PDF for $4.00