[Amps] When did Grounded Grid begin?

[Colin Lamb]

My 1940 Radio Engineers Handbook dated 1943, by Terman has an grounded grid amplifier.  It also has a not that the design was called the "inverted amplifier" and it came from Electronics, Vol 13, Page 14, July 1940.

There is a circuit in my 1937 Radio Handbook that has the meter to measure plate current in the cathode of a parallel HK-254 amplifier.  

So these circuits may be around long before Orr.

Colin Lamb  K7FM