DOCUMENT 68 DECEMBER 1907
ADSX.
[35
329].
81
[1]Dated
by
the
stamp "Exp.
11
Dez
1907
A.B."
on
the document.
[2]Probably the Swiss Patent Office's
registration
number of the
patent application.
[3]Patent
lawyers,
located
at
Spitalgasse
32 (see
Adressbuch Bern
1908).
[4]The
full
description
of
the
patent application
is
"Alternating
Current Machine with Short-
Circuit Brushes and
Opposing Auxiliary Spools
for
Spark
Prevention"
("Wechselstromkollek-
tormaschine mit Kurzschlußbürsten und diesen
gegenüberliegenden
Hilfsspulen
zur
Funken-
vermeidung");
it
is
dated
1
December
1906 (see
printed
Patentschrift
Nr. 38853,
SzBeBgE).
Einstein's interest
in
this
case
may
have rested
in
part
on
experiences
gathered
in
his fa-
ther's and uncle's
firms in Munich, Pavia,
and Milan
(see Vol.
1,
"Albert Einstein-Beitrag für
sein
Lebensbild,"
pp.
li-lv),
as
well
as on
his
own
work with the Habicht brothers
(see
the ed-
itorial
note,
"Einstein's 'Maschinchen' for the Measurement of Small
Quantities
of Electrici-
ty," pp. 51-55).
[5]In
contrast to
German and American
practice
and
more
in
keeping
with French
proce-
dures,
Swiss
patent applications
concentrated
on a
clear formulation of the claimed invention
and did
not
involve
a
determination of its
utility
or
priority
(see
Bundesgesetz
betreffend die
Erfindungspatente
vom
21.
Juni
1907,
in Schweizerisches
Bundesblatt
59,
no.
28
[29
June
1907],
articles
26
and
3).
Einstein later stressed that "the work
on
the definitive formulation
of technical
patents [was]
a
real
blessing
for me"
("die
Arbeit
an
der
endgültigen Formulierung
technischer Patente
[war]
ein wahrer
Segen
für
mich") (see
Einstein
1955,
p.
147; manuscript
and
typescript
versions of this reminiscence
are
in the Einstein
Archives,
[1
205]
and
[1
206]).
[6]A
second
complaint,
also
in
Einstein's
hand,
was
filed
on 11
February 1908 (see Sz-Ar,
E
22/2338,
Dossier
Einstein)
and took issue with
a
supplementary patent
application
of
14
No-
vember
1907 (see
printed
Patentschrift
Nr. 39988, SzBeBgE).
68.
To
Rudolf
Ladenburg
Bern.
20.
XII
07
Geehrter Herr
Dr![1]
Sehr erfreut über Ihr Interesse
an
jener
Arbeit,
sende ich Ihnen
3
Exempla-
re
(eines
für
Sie,
zwei für die beiden andern
Herrn.[2]
Hochachtungsvoll
Ihr
ergebener
A.
Einstein
Patentamt Bern.
AKS
(Georg
Mandl, Netstal,
Switzerland). [81 179].
The
verso
is
addressed "Herrn
Dr. R.
La-
denburg Physikalisches
Institut
Breslau,"
and
postmarked
"Bern
Brf.Exp.
20.XII.07.-3."
[1]Ladenburg
(1882-1952)
was
Privatassistent in
physics
at
the
University
of Breslau.
[2]The
two
individuals in
question may
be Max Born
(1882-1970)
and Fritz Reiche
(1883-
1969).
Born had
recently
received his doctorate from the
University
of
Göttingen
and
was
at-
tending
lectures
at
the
University
of Breslau. Reiche had obtained his doctorate
a
month earlier
from the
University
of Berlin
and
was
continuing
his
physics
studies
in
Breslau.
Born later claimed that
Ladenburg
was so
caught up
in "enthusiasm"
("Eifer")
about rela-
tivity
that he visited Einstein
in
the
summer-probably
of 1909-to
persuade
him
to
attend the
81st
meeting
of the Gesellschaft Deutscher Naturforscher und
Ärzte,
which
was
held in
Salzburg
in
September
1909 (see
Max Born
to
Carl
Seelig, 8 January 1953,
SzZE
Bibliothek,
Hs. 304:228).
Einstein attended the
meeting
and delivered
a
lecture
on
radiation
theory,
in
which
relativity
was
touched
upon
as
well
(see
Einstein 1909c
[Vol. 2,
Doc.
60]).
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