CH116462A
(en )
1926-09-01
Device to facilitate hearing.
AT127062B
(en )
1932-02-25
Device for utilizing the fly coke in furnaces.
CH121269A
(en )
1927-07-01
Device for holding animals.
FR706190A
(en )
1931-06-19
Device for making the nuts unbreakable
CH145398A
(en )
1931-02-28
Device for holding objects.
CH129907A
(en )
1929-01-02
Device for sharpening pencils and the like.
CH139030A
(en )
1930-03-31
Device for converting light into current or voltage changes.
CH154075A
(en )
1932-04-30
Device for removing weeds.
AT131870B
(en )
1933-02-25
Device for drawing candles.
CH210952A
(en )
1940-08-15
Device for making flycatchers.
ES99711A1
(en )
1926-11-16
Improvements in accumulator batteries.
ES99710A1
(en )
1926-11-16
Improvements in accumulator batteries.
FR618030A
(en )
1927-03-02
Further training in t lamps. s. f.
ES97695A1
(en )
1926-07-16
Improvements in electric accumulator plates.
ES101128A1
(en )
1927-03-01
Improvements in receiving stations for T. S. H.
AT131897B
(en )
1933-02-25
Device for sharpening pencil leads.
AT116402B
(en )
1930-02-25
Device for rerailing vehicles.
ES92882A1
(en )
1925-06-01
An apparatus for collecting and purifying rainwater.
CH207016A
(en )
1939-09-15
Device for converting direct voltage into alternating voltage.
ES97588A1
(en )
1926-06-01
Improvements in razors.
ES99172A1
(en )
1926-11-01
Improvements in the reaper-threshers.
AT112303B
(en )
1929-02-25
Ammeter device to keep the current strength constant.
CA268290A
(en )
1927-02-08
Negative resistance device
CH131622A
(en )
1929-02-28
Device on stopwatches for setting the second hand to zero.
AT109129B
(en )
1928-03-26
Device for rolling in pipes.