CLAIMS

1.

A product (1) for electronic transmission of handwritten information, comprising at least one writ ing area (2) intended for the handwritten information and an address area (3) indicating an address to which the handwritten information is to be sent, c h a r a c t e r i s e d in that a positioncoding pattern in the form of a plurality of symbols (4) is reproduced in the writing area (2), an arbitrary position area (5) of a predetermined size of the positioncoding pattern unam biguously defining a position on the product, and that the address area (3) comprises an addresscoding pat tern with a plurality of symbols (6), an arbitrary address portion (20) of a predetermined size of the addresscoding pattern unambiguously defining part of the address.

2.

A product as claimed in claim 1, c h a r a c t e r i s e d in that the size of the position area required to unambiguously determine a position from the positioncoding pattern at least is the same as the size of the address portion required to unambiguously deter mine part of the address from the addresscoding pattern.

3.	A product as claimed in claim 1 or 2, c h a r a c t e r i s e d in that said part of the address is an individual character.

4.	A product as claimed in claim 1, 2 or 3, c h a r a c t e r i s e d in that the address area (3) contains information which defines a communication medium that is to be used for transmission of the handwritten information.

5.

A product as claimed in any one of the preceding claims, c h a r a c t e r i s e d in that the position coding pattern defines coordinates within a partial code area which is part of a larger virtual code area, the address area containing information which defines the coordinates for at least part of the writing area.

6.

A product as claimed in any one of the preceding claims, c h a r a c t e r i s e d in that the address coding pattern comprises a plurality of sequence portions with symbols (4), the address portion which is required to define part of the address comprising sequence por tions of a predetermined number and of a predetermined length.

7.

A product as claimed in claim 6, c h a r a c t e r i s e d in that each of the sequence portions com prises at least one subsequence of a predetermined length of a sequence, each subsequence unambiguously defining a sequence value which corresponds to the position of the subsequence in the sequence.

8.

A product as claimed in claim 7, c h a r a c t e r i s e d in that the difference between the sequence value defined by a subsequence of a first sequence portion, and the sequence value defined by a subsequence of a second sequence portion is constant independently of from which parts of the sequence por tions the subsequences are selected when the subsequences are fetched from corresponding parts of the sequence portions.

9.

A product as claimed in claim 8, c h a r a c t e r i s e d in that the difference value which corre sponds to the difference between sequence values from different sequence portions is represented as a binary value, a first part of the binary value representing a character and a second part of the binary value repre senting part of a position indication for the sequence portions in the matrix.

10.	A product as claimed in any one of the preceding claims, c h a r a c t e r i s e d in that the symbols in the addresscoding pattern are of a size different from that of the symbols in the positioncoding pattern.

11.	A product as claimed in any one of the preceding claims, c h a r a c t e r i s e d in that the symbols in the addresscoding pattern are arranged with an inter space different from that of the symbols in the position coding pattern.

12.	A product as claimed in any one of the preceding claims, c h a r a c t e r i s e d in that the address area (3) also codes a public key, the receiver specified by the address being capable of decoding a message which has been coded with the public key.

13.	A product as claimed in claim 1, c h a r a c t e r i s e d in that the address area (36) is divided into a plurality of code fields (37) each of which codes a partial code area of a virtual code area, each partial code area corresponding to a character.

14.	A product as claimed in claim 13, c h a r a c t e r i s e d in that the code fields are separated by means of separation fields (38).

15.

A user unit for electronic transmission of hand written information, which comprises a reading head and a memory (10) and which is adapted to optically record by means of the reading head images from a surface, c h a r a c t e r i s e d in that it is further (11) adapted to convert the recorded image to at least one position and store the position in the memory (10) in response to the fact that the recorded image contains a position coding pattern which codes at least one position, convert the recorded image to at least one character and store the character in the memory (10) in response to the fact that the recorded image contains an addresscod ing pattern which codes at least one character, and transmit at least part of positions stored in the memory (10) to an address corresponding to characters stored in the memory.

16.	A user unit as claimed in claim 15, c h a r a c t e r i s e d in that it also comprises a pen point (21) and is adapted to record images when the pen point (21) is pressed against a surface.

17.

A user unit as claimed in claim 15 or 16, c h a r a c t e r i s e d in that it is adapted to convert a first part of characters stored in the memory to an address and a second part of characters stored in the memory to position information which defines a writing area, and only transmit positions contained in the writing area to the address.

18.

A user unit according to any one of claims 15, 16 or 17, c h a r a c t e r i s e d in that it is adapt ed to convert recorded images of the addresscoding pat tern to a set of sequence portions, convert the set of sequence portions to a set of sequence values, and convert the sequence values to characters by means of information stored in the memory.

19.	A user unit as claimed in any one of claims 1518, c h a r a c t e r i s e d in that it is adapted to enclose an identification number when transmitting information to the address, said identification number being unique for each user unit.

20.

A memory medium, which can be read by a compu ter (11) and on which a computer program is stored which is adapted to be used for entering handwritten informa tion and for electronic transmission of the information, c h a r a c t e r i s e d in that the computer program comprises instructions for making the computer (11) read an input signal corresponding to a recorded image, convert the recorded image to at least one position and store the position in response to the fact that the recorded image corresponds to a positioncoding pattern, convert the recorded image to at least one character and store the character in response to the fact that the recorded image corresponds to an addresscoding pattern, and transmit stored positions to an address correspond ing to characters stored in the memory.

21.	A memory medium as claimed in claim 20, c h a r a c t e r i s e d in that the computer program makes the computer (11) convert part of the stored char acters to writing position information which defines a writing area, and to transmit only positions contained in the writing area to the address.