The Esrille New Keyboard - NISSE
Copyright 2013-2022 Esrille Inc.

This product includes the design (the "Design") and the firmware (the
"Firmware") of the Esrille New Keyboard - NISSE being developed at Esrille Inc.
(https://www.esrille.com/keyboard/).

Unless otherwise explicitly stated in the individual source files,
Esrille Inc. is supplying the Firmware for use solely and exclusively on
the Esrille New Keyboard - NISSE. Hardware vendors and other distributors that
combine and distribute commercially the hardware products with the Firmware
must enter into a commercial license agreement with Esrille Inc.

The Design is licensed under a Creative Commons Attribution-ShareAlike 4.0
International License. You may obtain a copy of the License at:
    http://creativecommons.org/licenses/by-sa/4.0/

The Design covered by the above mentioned license is limited to the position
of the key switches. The other design elements including but not limited to the
design of the keyboard enclosure and the design of the font-faces used for the
keycap legends, are provided under licenses other than the above mentioned
license and may be under the copyright of organizations other than Esrille
Inc.

Some portions of the Firmware is licensed under the Apache License, Version 2.0
(the "License"); you may not use those portions except in compliance with the
License. You may obtain a copy of the License at:
    http://www.apache.org/licenses/LICENSE-2.0

Some portions of the Firmware are provided under licenses other than the above
mentioned licenses and may be under the copyright of organizations other than
Esrille Inc.

The USB Product ID ("PID") 0xf550 used in the Firmware is sublicensed from
Microchip Technology Inc., for the initial 10,000 units of the Esrille New
Keyboard - NISSE that are shipped from Esrille Inc. If the Firmware is to be
used in the other products, you will be responsible for obtaining another PID
and/or a USB Vendor ID.

For more information, please contact at info@esrille.com.


== ⚠ ATTENTION ==

Several source files of the Firmware contain comment lines including the
⚠ ATTENTION mark. Those files must not be modified to maintain Bluetooth®
Qualification of the Esrille New Keyboard - NISSE.

See "Bluetooth Qualification and Declaration Processes" for more details:
  https://www.bluetooth.org/en-us/test-qualification/qualification-overview


== Credits ==

The Bluetooth® word mark and logos are registered trademarks owned by the
Bluetooth SIG, Inc. and any use of such marks by Esrille Inc. is under
license.


The Firmware contains code provided by Microchip Technology Incorporated for
its PIC Microcontroller, for use solely and exclusively on Microchip PIC
Microcontroller products; see the individual source files for details.

The Firmware supports the NICOLA keyboard layout developed at:
    The Nihongo-Nyuryoku Consortium (http://nicola.sunicom.co.jp/)
    The design of the original Thumb Shift Keyboard is published in 1979
    from Fujitsu.
    http://www.fujitsu.com/global/about/profile/history/products/computer/wordprocessor/keyboard.html

The Firmware supports the Japanese logical layout of the TRON keyboard
published as:
    Ken Sakamura, "Method to Input Japanese characters in BTRON Environment -
    Design of TRON Keyboard", Information Processing Society of Japan, Japanese
    Documentation Processing Study Group, 7-2, 1986.
    (https://ipsj.ixsq.nii.ac.jp/ej/index.php?active_action=repository_view_main_item_detail&item_id=37816&item_no=1&page_id=13&block_id=8)

The Firmware supports the Japanese logical layout of the M-type keyboard
published as:
    Masasuke Morita, "On the Optimization of Japanese Text Input System and
    Keyboard System", IEICE Trans. D, Vol.J70-D, No.11, 1987.
    (http://search.ieice.org/bin/summary.php?id=j70-d_11_2047&category=D&lang=J&year=1987&abst=)


== The Esrille logo ==

The Esrille logo is a trademark of Esrille Inc. All rights reserved.

The Esrille logo is a special trademark to identify the products developed and
distributed by Esrille Inc.

The Esrille logo can be used by anyone if that use of the logo is nominative.
The "nominative use" authorizes everyone (even commercial companies) to use
the trademark of another if:

  1. The product or service cannot be readily identified without use of
     the trademark;
  2. The user only uses as much of the mark as is necessary to identify
     the product or service; and,
  3. The user does nothing to suggest sponsorship or endorsement by the
     trademark holder.