Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication of NL101661CpublicationCriticalpatent/NL101661C/xx
A01C7/08—Broadcast seeders; Seeders depositing seeds in rows
A01C7/16—Seeders with other distributing devices, e.g. brushes, discs, screws or slides
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03C—MODULATION
H03C1/00—Amplitude modulation
H03C1/16—Amplitude modulation by means of discharge device having at least three electrodes
H03C1/18—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid
H03C1/20—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid modulating signal applied to anode