[CW] Lightening Bug Patents

[Richard Knoppow]

    Yes, the LaHiff patent is a rather late one. Probably not on keys 
that don't have the adjustable main spring. They also indicate there is 
a patent for the jeweled bearing, maybe the same patent.
    I have the LaHiff patent in my collection somewhere.

On 3/29/2024 11:25 AM, martin.odenbach at t-online.de wrote:
> 2,187,351 shows a Lightning bug  - LaHiff patent.
> 
> 
> 
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-- 
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998